1 Department of Dermatology, Venereology and Allergology, University Hospital Wuerzburg, Josef-Schneider-Str. 2, 97080 Wuerzburg, Germany.
2 Dermatology Department, Hôpital Edouard Herriot, Lyon, France.
3 Dermatology Department, Hospital de Santo António dos Capuchos - Centro Hospitalar de Lisboa Central, Alameda Santo António dos Capuchos 1169-050, Lisbon, Portugal.
5 Department of Dermatology and Venereology, Hôpital de Beaumont, Lausanne University Hospital Center, Av. de Beaumont 29, CH-1011 Lausanne, Switzerland.
6 Dermatology Department, General University Hospital Gregorio Marañon, C/ Doctor Esquerdo 46, 28007, and Dermatology Department, Clinica Dermatologica Internacional and Complejo Hospitalario Universitario Ruber Juan Bravo, Madrid, Spain.