1. Department of DermatologyVenereology and AllergologyUniversity Hospital Essen Essen Germany
2. Research DivisionDepartment of OtorhinolaryngologyUniversity Hospital Essen Essen Germany
3. Department of Dermatology and VenereologyUniversity Hospital of Cologne Cologne Germany
4. Department of DermatologyVenereology and AllergologyUniversity Hospital Würzburg Würzburg Germany
5. German Cancer Consortium (DKTK) Partner SiteEssen‐Düsseldorf Essen Germany