1. Institute for Social Medicine, Epidemiology and Health Economics, Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Luisenstr. 57, Berlin, Germany
2. International Institute for Integrated Medicine, Kingston, UK
3. Independent Researcher, Breda, Netherlands
4. Central Council for Research in Homoeopathy, Janak Puri, New Delhi, India
5. Family Physician, Hünstetten, Kesselbach, Germany
6. Institute of Integrative Medicine, Universität Witten-Herdecke, Herdecke, Germany