1 Division of Dermatology, Department of Medicine, McGill University Health Centre, Montreal, Québec, Canada.
2 Faculty of Medicine, McGill University Health Centre, Montreal, Québec, Canada.
3 Lady Davis Institute, Jewish General Hospital, McGill University, Montréal, Québec, Canada.
4 Lady Davis Institute, Jewish General Hospital, McGill University, Montréal, Québec, Canada; Division of Rheumatology, Department of Medicine, Jewish General Hospital, Montréal, Québec, Canada.
5 Department of Epidemiology and Biostatistics, Occupational Environment Research Center, Medical School, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
6 Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
7 Division of Rheumatology, Department of Medicine, Jewish General Hospital, Montréal, Québec, Canada.
8 Division of Dermatology, Department of Medicine, McGill University Health Centre, Montreal, Québec, Canada. Electronic address: [email protected].