1. Atlanta VA Medical Center; Decatur GA USA
2. Division of Geriatrics; Emory University School of Medicine; Atlanta GA USA
3. Department of Biostatistics and Bioinformatics; Rollins School of Public Health; Emory University; Atlanta GA USA
4. Division of Endocrinology and Metabolism; Emory University School of Medicine; Atlanta GA USA
5. Division of General Internal Medicine and Geriatrics; Department of Medicine; Emory University School of Medicine; Atlanta GA USA
6. Nutrition and Health Sciences; Graduate Division of Biological and Biomedical Sciences; Emory University; Atlanta GA USA