1. Department of General Practice and Health Services Research, University Hospital Heidelberg, 69120 Heidelberg, Germany
2. Institute for General Practice and Interprofessional Care, University Hospital Tübingen, 72076 Tübingen, Germany
3. National Center for Tumor Diseases, University Hospital Heidelberg, 69120 Heidelberg, Germany
4. Women’s Clinic, Community Hospital Karlsruhe, 76133 Karlsruhe, Germany
5. Center for Integrative Medicine, Cantonal Hospital St. Gallen, 9007 St. Gallen, Switzerland
6. Department of Naturopathy and Integrative Medicine, Robert-Bosch-Krankenhaus, 70376 Stuttgart, Germany
7. Center for Integrative Oncology, Die Filderklinik, 70794 Filderstadt-Bonlanden, Germany
8. Anthroposophic Nursing Network in Germany, Academy for Nursing Professions at the Filderklinik, Die Filderklinik, 70794 Filderstadt-Bonlanden, Germany
9. Clinic for Radiation Therapy and Special Oncology, Hannover Medical School, 30625 Hannover, Germany
10. Department of Internal and Integrative Medicine, Evang. Kliniken Essen-Mitte, Faculty of Medicine, University of Duisburg-Essen, 45136 Essen, Germany
11. Department of Health, Zurich University of Applied Sciences, 8401 Winterthur, Switzerland
12. Department of Nursing Science, Institute of Health Sciences, University Hospital Tübingen, 72076 Tübingen, Germany
13. Institute for Complementary and Integrative Medicine, University Hospital Zürich and University of Zürich, 8091 Zürich, Switzerland