1. Clinic for Psychosomatic Medicine and Psychotherapy, LVR-University Hospital, University of Duisburg-Essen, Essen, Germany
2. West German Cancer Center, University Hospital Essen, Essen, Germany
3. Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University of Duisburg-Essen, Essen, Germany
4. Department of Palliative Medicine, University Hospital Essen, University Duisburg-Essen, Essen, Germany
5. Faculty of Sleep Medicine and Telemedicine, West German Lung Center, University Medicine Essen - Ruhrlandklinik, University of Duisburg-Essen, Essen, Germany
6. Department of Medical Oncology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
7. Department of Dermatology, University Hospital Essen, University Duisburg-Essen, Essen, Germany