1. Department of Psychosomatic Medicine and Psychotherapy University Hospital Tübingen Tübingen Germany
2. Institute of Occupational and Social Medicine and Health Services Research University of Tübingen Tübingen Germany
3. Institute of Nutritional Medicine, School of Medicine Technical university of Munich Munich Germany
4. Charité Center for Internal Medicine and Dermatology, Department for Psychosomatic Medicine Charité‐Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt‐Universität zu Berlin, and Berlin Institute of Health Berlin Germany