1. Department of Dermatology and Allergology, University Hospital LMU Munich Munich Germany
2. Department of Dermatology, Uniklinikum Erlangen, Comprehensive Cancer Center Erlangen – EMN Friedrich‐Alexander University Erlangen‐Nürnberg Erlangen Germany
3. Department of Dermatology and Allergy Hannover Medical School Hannover Germany
4. Institute of Pathology, Faculty of Medicine LMU Munich Munich Germany
5. Department of Dermatology, National Center for Tumor Diseases (NCT) Heidelberg University Hospital Heidelberg Germany
6. Department of Dermatology, Allergology and Venerology University Medical Center Leipzig Germany
7. Department of Dermatology Hospital Dortmund Dortmund Germany
8. Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery University of Miami, Miller School of Medicine Miami Florida USA
9. Department of Dermatology, Johannes Wesling Medical Center Ruhr University Bochum Campus Minden Minden Germany