2 Department of Dermatology and Venereology, Hospital de Santo António dos Capuchos - Centro Hospitalar de Lisboa Central, Alameda de Santo António dos Capuchos, 1169-050 Lisbon, Portugal.
3 Department of Dermatology, Venerology and Allergology, University Hospital Wuerzburg, Joseph-Schneider-Str. 2, 97080 Wuerzburg, Germany.
4 Dermatology Department, Hôpital Edouard Herriot, Lyon, France.
5 Dermatology Department, San Pedro Hospital, Logroño, Spain.
6 Department of Dermatology and Venereology, Hôpital de Beaumont, Lausanne University Hospital Center, Av. de Beaumont 29, CH-1011 Lausanne, Switzerland.