1. a Columbia University College of Physicians & Surgeons , New York , USA
2. b Division of Biostatistics , University of Minnesota , Minneapolis , MN , USA
3. c Department of Medicine and Department of Epidemiology & Population Health , Albert Einstein College of Medicine, and Bronx-Lebanon Hospital Center , New York , USA
4. d National Center for Complementary & Alternative Medicine , National Institutes of Health , Bethesda , MD , USA
5. e Community Consortium , University of California at San Francisco , San Francisco , CA , USA
6. f Departments of Epidemiology and Medicine , Johns Hopkins University , Baltimore , MD , USA
7. g Yale School of Medicine, Yale New Haven Hospital , Yale University , New Haven , CT , USA