1 Faculty of Medicine, Memorial University, St. John's, Newfoundland, Canada.
2 Division of Dermatology, Department of Medicine, University of Toronto, Ontario, Canada.
3 Faculty of Health Sciences, Brock University, St. Catharines, Ontario, Canada.
4 Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada.
5 Division of Dermatology, Department of Medicine, University of Toronto, Ontario, Canada; Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Probity Medical Research, Waterloo, Ontario, Canada. Electronic address: [email protected].