[1] Univ Montreal, Fac Med, Montreal, PQ, Canada
[2] McGill Univ, Dept Med, Div Dermatol, Montreal, PQ, Canada
[3] Jewish Gen Hosp, Dept Med, Div Dermatol, Montreal, PQ, Canada
[4] Lady Davis Inst Med Res, Montreal, PQ, Canada
[5] Jewish Gen Hosp, Dept Med, Div Dermatol, 3755 Chemin Cote Sainte Catherine, Montreal, PQ H3T 1E2, Canada