1. Institute for General Practice and Palliative Care, Hannover Medical School , Hannover , Germany
2. Department of General Practice and Health Services Research, University Hospital Heidelberg , Heidelberg , Germany
3. Department of Psychosomatic Medicine and Psychotherapy, Professorship of Spiritual Care and Psychosomatic Health, Technical University of Munich , München , Germany
4. Institute of General Practice and Interprofessional Care, University Hospital Tübingen , Tübingen , Germany