1. Section of Health Services Research and Rehabilitation Research Institute of Medical Biometry and Statistics University of Freiburg Medical Center Freiburg Germany
2. Department of Self‐Help Research Comprehensive Cancer Center University of Freiburg Medical Center Freiburg Germany
3. Niederrhein Center for Oncological Rehabilitation Bad Neuenahr‐Ahrweiler Germany
4. Center for Oncological Rehabilitation at the Tumor Biology Center University of Freiburg Medical Center Freiburg Germany
5. Park Therme Center for Oncological Rehabilitation Hamm‐Kliniken GmbH Badenweiler Germany
6. Nahetal Center for Oncological Rehabilitation Hamm‐Kliniken GmbH Bad Kreuznach Germany
7. Research Foundation Tumor Biology Freiburg Germany