1. Department of Biochemistry and Molecular Biology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR 72205
2. Clinical Research Center and Center for Clinical and Translational Research, University of Arkansas for Medical Sciences, Little Rock, AR 72205
3. Division of Biostatistics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR 72205
4. Arkansas Department of Health, Public Health Laboratory and Department of Pharmacology and Toxicology, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR 72205