1. Department of Exercise Science and Arnold School of Public Health, University of South Carolina, Columbia, SC, USA.
2. Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA.
3. Department of Health, Behavior and Society, Johns Hopkins, Baltimore, MD, USA.
4. School of Kinesiology, University of Michigan, Ann Arbor, MI, USA.