1. Department of Dermatology, Venereology and AllergologyUniversity Medical Center Göttingen Robert‐Koch‐Straße 40 37099 Göttingen Germany
2. Paul‐Ehrlich‐Institut Langen Germany
3. Department of Dermatology and Allergology University Medical Center Erlangen Erlangen Germany
4. Department of Dermatology and Allergology Allergy Center Hessen University Medical Center Marburg Marburg Germany
5. Lower Saxony Institute of Occupational DermatologyUniversity Medical Center Göttingen Robert‐Koch‐Straße 40 37099 Göttingen Germany
6. Information Network of Departments of Dermatology (IVDK) University Medical Center Göttingen Robert‐Koch‐Straße 40 37099 Göttingen Germany