[1] Univ Hosp Geneva, Div Dermatol & Venereol, Geneva, Switzerland
[2] Lausanne Univ Hosp, Dermatol & Venereol, Lausanne, Switzerland
[3] Lausanne Univ Hosp, Div Immunol & Allergy, Lausanne, Switzerland
[4] Ctr Hosp Univ Toulouse, Dept Dermatol, Toulouse, France