1. Medical Psychology & Medical Sociology, Psychosocial Oncology, University Medical Center Leipzig, Leipzig, Germany;
2. Division of Hematology and Oncology, University Hospital of Leipzig, Leipzig, Germany;
3. Department of Internal Medicine III, University Hospital of Ulm, Ulm, Germany;
4. Comprehensive Cancer Center Ulm (CCCU), Ulm, Germany;
5. Department of Psychosomatic Medicine and Psychotherapy, University of Ulm, Ulm, Germany;
6. Department of Internal Medicine III, University of Regensburg, Regensburg, Germany