1 Department of Dermatology and Allergy, University Hospital Basel, Basel, Switzerland.
2 Department of Dermatology, Alpert Medical School of Brown University, Providence, Rhode Island, USA.
3 Department of Dermatology, Medical School of Jundiaí, São Paulo, Brazil.
4 Department of Dermatology, St George Hospital, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia.
5 College of Medicine, Central Michigan University, Saginaw, Michigan, USA.
6 Department of Dermatology, University of Studies Guglielmo Marconi, Rome, Italy.
7 Department of Dermatology and Allergology, Städtisches Klinikum Dresden, Academic Teaching Hospital of the Technical University of Dresden, Dresden, Germany.