1. Department for Psychosomatic Medicine and Psychotherapy, Center for Health Communication and Health Services Research (CHSR) University Hospital Bonn Bonn Germany
2. Center for Integrated Oncology (CIO) University Hospital Bonn Bonn Germany
3. Department for Psychosomatic Medicine and Psychotherapy, Faculty of Medicine University Hospital Bonn Bonn Germany
4. Department of Integrated Oncology University Hospital Bonn Bonn Germany
5. Department of Medical Psychology University Medical Center Hamburg‐Eppendorf Hamburg Germany
6. Department of Health Services Research, School of Medicine and Health Sciences, Division for Organizational Health Services Research Carl von Ossietzky University Oldenburg Oldenburg Germany