1. Department of Dermatology; University Medical Center Regensburg; Regensburg Germany
2. Department of Internal Medicine III, Oncology; University Medical Center Regensburg; Regensburg Germany
3. Department of Surgery; University Medical Center Regensburg; Regensburg Germany
4. Institute of Human Genetics; University of Cologne; Cologne Germany
5. Department of Otorhinolaryngology; University Medical Center Regensburg; Regensburg Germany