1. Department of Epidemiology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.
2. College of Health Professions/College of Nursing, Walden University, Minneapolis, Minnesota, USA.
3. Department of Mathematics, University of Central Arkansas, Conway, Arkansas, USA.
4. School of Health Promotion and Kinesiology, Texas Woman's University, Denton, Texas, USA.
5. Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.