1. Center for Health Communication and Health Services Research (CHSR). Department of Psychosomatic Medicine and Psychotherapy, University Hospital Bonn, Bonn, Germany
2. Center for Integrated Oncology Cologne Bonn, Germany
3. German Cancer Society (DKG), Berlin, Germany
4. Department of Psychosomatic Medicine and Psychotherapy, University Hospital Cologne, Cologne, Germany
5. Breast Center, Department of Gynecology and Obstetrics and CCCLMU, University of Munich (LMU), Munich, Germany