1. Department of Internal and Complementary Medicine, Immanuel Hospital and Institute of Social Medicine, Epidemiology & Health Economics, Charité-University Medical Center, Research Coordination, Königstraße 63, 14109 Berlin, Germany
2. eScience Center, University of Bremen, Universitätsallee, 28359 Bremen, Germany
3. Graduate School in History and Sociology, Bielefeld University, 33615 Bielefeld, Germany
4. Institute of Complementary Medicine, University Hospital Zurich, 8001 Zurich, Switzerland
5. Department for Psychiatry, Psychotherapy and Psychosomatics, Königin-Elisabeth-Herzberge Hospital, 10365 Berlin, Germany