1. Integrated Curriculum for Anthroposophic Medicine, Institute for Integrative Medicine, Faculty for Health, Department for Medicine, Alfred-Herrhausen-Straße 50, 58448 Witten, Germany
2. Gemeinschaftskrankenhaus Herdecke, Department for Internal Medicine, Gerhard-Kienle-Weg 4, 58313 Herdecke, Germany
3. Research Institute Havelhöhe, Kladower Damm 221, 14089 Berlin, Germany
4. Department of Internal Medicine, Havelhöhe Hospital, Kladower Damm 221, 14089 Berlin, Germany
5. Institute for Integrative Medicine, Faculty for Health, Department for Medicine, University of Witten/Herdecke, Alfred-Herrhausen-Straße 50, 58448 Witten, Germany