1. University Medical Center Hamburg-Eppendorf, Hamburg, Germany
2. Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA
3. Department of Dermatology, Venereology and Allergology, Charité-Universitätsmedizin Berlin, Berlin, Germany
4. SRH Wald-Klinikum Gera, Gera, Germany
5. Department of Radiation Oncology, University Hospital Bonn, Bonn, Germany
6. Department of Dermatology, University of Kiel, Kiel, Germany