[1] Univ British Columbia, Vancouver, BC, Canada
[2] Univ Calgary, Cumming Sch Med, Calgary, AB, Canada
[3] Laval Univ, Fac Med, Quebec City, PQ, Canada
[4] McGill Univ Hlth Ctr, Div Dermatol, Montreal, PQ, Canada
[5] Univ British Columbia, Dept Dermatol & Skin Sci, Vancouver, BC, Canada