The European standard series in 9 European countries, 2002/2003 – First results of the European Surveillance System on Contact Allergies

Corresponding Author

W. Uter

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

J. Hegewald

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

W. Aberer

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

F. Ayala

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

A. J. Bircher

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

J. Brasch

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

P.-J. Coenraads

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

M.-L. A. Schuttelaar

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

P. Elsner

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

M. Fartasch

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

V. Mahler

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

A. Belloni Fortina

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

P. J. Frosch

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

T. Fuchs

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

J. D. Johansen

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

T. Menné

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

R. Jolanki

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

B. Krêcisz

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

M. Kiec-Swierczynska

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

F. Larese

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

D. Orton

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

A. Peserico

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

T. Rantanen

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany

A. Schnuch

¹ Department of Medical Informatics, Biometry & Epidemiology, University of Erlangen-Nürnberg, Erlangen, Germany, ² Department of Dermatology, Medical University of Graz, Austria, ³ Department of Dermatology, Universita di Napoli Federico II, Napoli, Italy, ⁴ Department of Dermatology, Allergy Unit, University Hospital Basel, Basel, Switzerland, ⁵ Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Germany, ⁶ Department of Dermatology, University Medical Centre Groningen, Groningen, the Netherlands, ⁷ Department of Dermatology and Allergology, Friedrich Schiller University, Jena, Germany, ⁸ Department of Dermatology, University of Erlangen-Nürnberg, Erlangen, Germany, ⁹ Dermatology Unit, Department of Pediatrics, University of Padova, Padova, Italy, ¹⁰ Department of Dermatology, Dortmund and University of Witten/Herdecke, Witten/Herdecke, Germany, ¹¹ Department of Dermatology, University of Göttingen, Göttingen, Germany, ¹² Department of Dermatology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark, ¹³ Department of Dermatology, Finnish Institute of Occupational Health (FIOH), Helsinki, Finland, ¹⁴ Department of Dermatology, Nofer Institute, Lodz, Poland, ¹⁵ Department of Public Health, Occupational Medicine, University of Trieste, Trieste, Italy, ¹⁶ Department of Dermatology, Amersham Hospital, Amersham, UK, ¹⁷ Department of Dermatology, University of Padova, Italy, ¹⁸ Department of Dermatology, Päijät-Häme Central Hospital, Lahti, Finland, and ¹⁹ Information Network of Departments of Dermatology (IVDK), University of Göttingen, Göttingen, Germany