1. Department of Preventive Medicine and Public Health at the University of Kansas School of Medicine-Wichita, Wichita, Kansas,
2. Department of Preventive Medicine and Public Health at the University of Kansas School of Medicine-Wichita, Wichita, Kansas
3. Bureau of Local and Rural Health, Kansas Department of Health and Environment, Topeka, Kansas
4. School of Public and Community Health Sciences, University of Montana, Missoula, Montana