1. IGES Institute; Berlin Germany
2. IMC clinicon; Berlin Germany
3. Department of Dermatology and Venerology; Otto von Guericke University; Magdeburg Germany
4. Department of Dermatology, Venerology and Allergology; Goethe University Frankfurt; Frankfurt am Main Germany
5. Department of Dermatology; Johannes Wesling Klinikum; Minden Germany
6. Department of Dermatology; Klinikum Kassel; Kassel Germany
7. Alice Salomon Hochschule Berlin; University of Applied Sciences; Berlin Germany