1. Department of Dermatology; University Hospital Tübingen; Tübingen Germany
2. Hautarztpraxis Oranienburg; Oranienburg Germany
3. Department of Surgery and Biomedicine; University of Perugia; Perugia Italy
4. Department of Dermatology; Hospital del Mar; Barcelona Spain
5. Department of Pathophysiology and Transplantation; Universita degli Studi di Milano; Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Foundation, Cà Granda Ospedale Maggiore Policlinico; Milan Italy