1. Division of Dermatology, Department of Medicine, University of Calgary, Alberta, Canada
2. Department of Dermatology and Skin Science, University of British Columbia, Vancouver, Canada
3. Division of Dermatology, Department of Medicine, University of Toronto, Canada
4. Division of Dermatology, Department of Medicine, The Ottawa Hospital, University of Ottawa, Canada
5. Division of Dermatology, Department of Medicine, Dalhousie University, Halifax, Canada