Affiliation: | 1. Division of Dermatology, University of Ottawa, Ottawa, Ontario, Canada;2. Department of Medicine, McGill University, Montréal, Québec, Canada;3. Division of Dermatology, McGill University, Montréal, Québec, Canada;4. Division of Clinical Epidemiology, McGill University, Montréal, Québec, Canada;5. Ottawa Hospital Research Institute, Ottawa, Ontario, Canada;6. Division of Hematology, McGill University, Montréal, Québec, Canada |