[1] Geneva Univ Hosp, Div Dermatol & Venereol, Rue Gabrielle Perret Gentil 4, CH-1205 Geneva, Switzerland
[2] Univ Toronto, Dept Med, Div Dermatol, Toronto, ON, Canada
[3] McMaster Univ, Michael G De Groote Sch Med, Hamilton, ON, Canada
[4] Univ Toronto, Temerty Fac Med, Toronto, ON, Canada
[5] Womens Coll Hosp, Dept Med, Div Dermatol, Toronto, ON, Canada
[6] Univ Hlth Network, Dept Med, Div Dermatol, Toronto, ON, Canada