1. Department of Dermatology, Venereology and Allergology University Medical Center Göttingen Göttingen Germany
2. Department of Clinical Chemistry University Medical Center Göttingen Göttingen Germany
3. Interdisciplinary UMG Laboratory University Medical Center Göttingen Göttingen Germany
4. Lower Saxony Institute of Occupational Dermatology University Medical Center Göttingen Göttingen Germany
5. Institute of Medical Microbiology and Virology University Medical Center Göttingen Göttingen Germany
6. Department of Medical Statistics University Medical Center Göttingen Göttingen Germany
7. Institute of Medical Microbiology and Hospital Hygiene, Medical Faculty Otto‐von‐Guericke University Magdeburg Magdeburg Germany
8. Center for Health and Medical Prevention (CHaMP) Otto‐von‐Guericke University Magdeburg Magdeburg Germany
9. Department of Dermatology University of Münster Münster Germany