1. Department of Dermatology University Medical Center Regensburg Franz‐Josef‐Strauss‐Allee 11 93053 Regensburg Germany
2. Dornierstr. 33e 94315 Straubing Germany
3. Center for Clinical Trials Regensburg University Medical Center Regensburg Franz‐Josef‐Strauss‐Allee 11 93053 Regensburg Germany
4. Department of Dermatology and Allergology Klinikum Vest Academic Teaching Hospital 45657 Recklinghausen Germany