1. Department of Epidemiology and Biostatistics, College of Health Sciences, Jackson State University, Jackson, Mississippi, USA.
2. School of Pharmacy and Biomedical Sciences, University of Portsmouth, England, United Kingdom.
3. Department of Ophthalmology and Pathology, University of Mississippi Medical Center, Jackson, Mississippi, USA.
4. Department of Research & Development, GV (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, Mississippi, USA.