1. Division of Periodontics; Department of Stomatology; College of Dental Medicine; Medical University of South Carolina; Charleston SC USA
2. Division of Endocrinology, Diabetes and Medical Genetics; Department of Medicine; College of Medicine; Medical University of South Carolina; Charleston SC USA
3. Ralph H. Johnson Veterans Affairs Medical Center; Charleston SC USA
4. Division of Biostatistics; Department of Public Health Sciences; College of Medicine; Medical University of South Carolina; Charleston SC USA