Debbie Jarvis

Respiratory Epidemiology and Public Health Group, Emmanuel Kaye Building, Manresa Road, National Heart and Lung Institute, Imperial College, London SW3 6LR, UK

Susan M. Tarlo

Department of Medicine, University of Toronto, Canada

Dalla Lana School of Public Health, University of Toronto, Canada

Division of Respiratory Medicine, University Health Network, Toronto, Ontario, Canada

Paul Cullinan

Occupational and Environmental Respiratory Disease, National Heart and Lung Institute (Imperial College), London, UK

Benoit Nemery

Toxicology and Occupational Medicine, Department of Public Health, Faculty of Medicine, Catholic University of Leuven, Leuven, Belgium