1. College of Medicine, University of Arkansas for Medical Sciences Northwest, Fayetteville, AR 72703, USA
2. College of Medicine, University of Arkansas for Medical Sciences Northwest, Springdale, AR 72762, USA
3. College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
4. Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
5. Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences Northwest, Springdale, AR 72762, USA