1. Department of Biostatistics and Epidemiology, School of Public Health, University of North Texas Health Science Center, Fort Worth, TX 76109, USA
2. Department of Internal Medicine and Geriatrics, Texas College of Osteopathic Medicine, University of North Texas Health Science Center, Fort Worth, TX 76109, USA
3. School of Public Health San Antonio, University of Texas, San Antonio, TX 78229, USA
4. Department of Kinesiology and Community Health, College of Applied Health Sciences, University of Illinois Urbana-Champaign, Champaign, IL 61820, USA