1. Institute for Health Services Research in Dermatology and Nursing (IVDP) University Medical Center Hamburg‐Eppendorf (UKE) Hamburg Germany
2. Institute of Dermatology, Università Cattolica Fondazione Policlinico Universitario A. Gemelli ‐ IRCCS Rome Italy
3. Department of Dermatology and Venereology University Medical Center Hamburg‐Eppendorf (UKE) Hamburg Germany