1. Department of Nutritional Medicine; University of Hohenheim; Stuttgart Germany
2. Institute for Medical Psychology and Behavioral Neurobiology; University of Tübingen; Tübingen Germany
3. Department of Psychosomatic Medicine and Psychotherapy; University Hospital Tübingen; Tübingen Germany
4. Department of General and Transplant Surgery and Comprehensive Cancer Center; University of Tübingen; Tübingen Germany
5. Arabella Clinic; München Germany