1. Charité – Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Institute for Social Medicine, Epidemiology and Health Economics, Berlin, Germany.
2. First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, Tianjin, China.
3. Institute for Complementary and Integrative Medicine, University of Zurich and University Hospital Zurich, Zurich, Switzerland.
4. Center for Integrative Medicine, University of Maryland School of Medicine Baltimore, MD.