1. Hamburg‐Eppendorf University Medical CenterInstitute for Healthcare Research in Dermatology and Nursing (IVDP) Martinistr. 52 20246 Hamburg Germany
2. Department of Dermatology and AllergologyUniversity Medical Center, Friedrich Wilhelm University Sigmund Freud Str. 25 53105 Bonn Germany
3. Office‐based Dermatologist Rüttenscheider Str. 143 45130 Essen Germany
4. University of Hamburg, Division of Cosmetic Sciences Papendamm 21 20146 Hamburg Germany
5. Office‐based Dermatologist Am Rathaus 2a 25421 Pinneberg Germany
6. MD medscript & consult Am Kuhtriftberg 21 67098 Bad Dürkheim Germany
7. Department of DermatologyUniversity Medical Center, Johannes Gutenberg University Langenbeckstr. 1 55131 Mainz Germany