1. Department of Biostatistics and Epidemiology, College of Public Health, East Tennessee State University, Johnson City, TN, USA;
2. Department of Health and Biomedical Science, College of Health Affairs, University of Texas Rio Grande Valley, TX, USA;
3. Department of Health Policy and Management, School of Public Health, University of Maryland, College Park, MD, USA;
4. Department of Economics and Finance, College of Business and Technology, East Tennessee State University, Johnson City, TN, USA;
5. Department of Family and Community Health, School of Nursing, Health Sciences Center, West Virginia University, Morgantown, WV, USA