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