1. Department of Epidemiology, West Virginia University School of Public Health, Morgantown, WV, USA
2. Center for the Study of Complementary and Alternative Therapies, University of Virginia Health System, Charlottesville, VA, USA
3. Department of Internal Medicine and Integrative Medicine, University of New Mexico School of Medicine, Albuquerque, NM and the Alzheimer’s Research and Prevention Foundation, Tucson, AZ, USA