1 Department of Dermatology, University CHUV, Lausanne, Switzerland.
2 Dermatology Department. Clinical University Hospital of Valencia. University of Valencia. Av Blasco Ibañez 17, 46010 Valencia, Spain.
3 Dermatology Department, Hospital de Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal; Dermatology Center, Hospital CUF Descobertas, Lisbon, Portugal.
4 Department of Dermatology, Venereology and Allergology. University Hospital Wuerzburg.
5 Department of Dermatology, Churchill Hospital, Old Road, Headington, Oxford, OX3 7LJ.
6 Department of Dermatology. University of California, San Francisco. 513 Parnassus Avenue HSW-518 San Francisco CA 94143-0511.