1. Department of Dermatology HELIOS‐Klinikum Hildesheim Hildesheim Germany
2. Kempf und Pfaltz Histologische Diagnostik Zürich Switzerland
3. Department of Dermatology University Hospital Zürich Zürich Switzerland
4. Department of Consultation‐Liaison‐Psychiatry and Psychosomatic Medicine University Hospital Zürich Zürich Switzerland
5. Department of Dermatology, Venereology and Allergology University Medical Center Göttingen Göttingen Germany