1. Department of Dermatology University Hospital Münster Münster Germany
2. Institute for Health Services Research in Dermatology and Nursing University Medical Center Hamburg‐Eppendorf Hamburg Germany
3. Vitos Psychosomatik Gießen Gießen Germany
4. Department of Dermatology University Medical Center Mainz Mainz Germany
5. Department of Dermatology and Allergology University Medical Center Technical University of Munich Munich Germany
6. Institute of Social Medicine and Health Systems Research Otto von Guericke University Magdeburg Magdeburg Germany
7. Psychoneuroimmunology Laboratory Department of Psychosomatic Medicine and Psychotherapy Justus Liebig University Gießen Gießen Germany and Universitätsmedizin – Charité Berlin Germany