Faculty of Medicine, University of Toronto, Toronto, ON, Canada. Faculty of Dentistry, University of Toronto, Toronto, ON, Canada. Division of Dermatology, Department of Medicine, University of Toronto, ON, Canada. Faculty of Health Sciences, Brock University, St. Catharines, ON, Canada. Division of Dermatology, Department of Medicine, University of Toronto, ON, Canada; Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Dermatology, Women's College Hospital, Toronto, ON, Canada. Electronic address: jensen.yeung@utoronto.ca.