1. Department of Dermatology; Division of Immunology, Allergy and Infectious Diseases; Medical University of Vienna; Vienna Austria
2. Faculty of Medicine; University of Zurich; Zurich Switzerland
3. Department of Dermatology; University Hospital Zurich; Zurich Switzerland
4. Department of Dermatology; Division of General Dermatology; Medical University of Vienna; Vienna Austria
5. Laboratory for Investigative Dermatology; The Rockefeller University; New York NY U.S.A.