Pick your poison: not all opioids are created equal in the eyes of dopamine (Commentary on Vander Weele et al.)

Dan P. Covey

Department of Anatomy and Neurobiology, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201 USA

Joseph F. Cheer

Department of Anatomy and Neurobiology, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201 USA

Department of Psychiatry, University of Maryland School of Medicine, 20 Penn Street, Baltimore, MD 21201 USA