1. Department of Psychosomatic Medicine and Psychotherapy, University Hospital Erlangen, Erlangen, Germany
2. Department of Psychosomatic Medicine and Psychotherapy, University Hospital Essen, Essen, Germany
3. Department of Transplant Medicine, University Hospital Münster, Münster, Germany
4. Department of General, Visceral and Transplantation Surgery, University Hospital Essen, Essen, Germany
5. Lukaskrankenhaus Neuss, HNO Klinik, Neuss, Germany