Med Sci Sports Exerc 2014 Aug;46(8):1570-7
1Division of Epidemiology, Human Genetics and Environmental Sciences, University of Texas Health Science Center at Houston, Austin, TX; 2Division of Research, Kaiser Permanente Northern California, Oakland, CA; 3Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN; and 4Division of Cardiovascular Sciences, Program in Prevention and Population Sciences, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD.