1. Osher Center for Integrative Medicine, Harvard Medical School, Brigham and Women's Hospital, Boston, Massachusetts.
2. Division of Preventive Medicine, Brigham and Women's Hospital, Boston, Massachusetts.
3. Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
4. Institute for Complementary and Integrative Medicine University Hospital Zurich, University of Zurich, Zürich, Switzerland.
5. Institute of Social Medicine, Epidemiology and Health Economics, Charité University Medical Center, Berlin, Germany.
6. Division of General Medicine and Primary Care, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts.