1 Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
2 Division of Dermatology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada.
3 Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada.
4 Division of Dermatology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada; Section of Dermatology, Division of Pediatric Medicine, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada; Division of Dermatology, Department of Medicine, Women's College Hospital, University of Toronto, Toronto, Ontario, Canada. Electronic address: [email protected].