1. a Department of Health Promotion Sciences , University of Oklahoma Health Sciences Center , Oklahoma City , OK , 73190
2. b Department of Health Administration and Policy College of Public Health , University of Oklahoma Health Sciences Center , Oklahoma City , Oklahoma , 73190
3. c Department of Family and Preventive Medicine , University of Oklahoma Health Sciences Center , Oklahoma City , OK , 73104
4. d Department of Biostatistics and Epidemiology, College of Public Health , University of Oklahoma Health Science Center , Oklahoma City , Oklahoma , 73190
5. e Department of Preventive Medicine and Public Health , University of Kansas School of Medicine , Kansas City , KS , 66160