1. Department of Biostatistics and Epidemiology, Hudson College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
2. Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
3. Department of Health Administration and Policy, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
4. Department of Health Administration and Policy, College of Health and Human Services, George Mason University, Washington, DC, USA
5. Department of Internal Medicine, College of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
6. Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA