1. Department of Dermatology, Venerology and AllergologyUniversity Medical Center Ruprecht‐Karls‐University Heidelberg Heidelberg Germany
2. Department of Thoracic OncologyThoraxklinik at Heidelberg University Hospital Heidelberg Germany
3. Department of PathologyUniversity Medical Center Ruprecht‐Karls‐University Heidelberg Heidelberg Germany
4. Department of Dermatology, Venerology and AllergologyUniversity Medical Center Graz Graz Austria