Johns Hopkins University - Department of Medicine, Johns Hopkins University, National Institutes of Health - Intramural Research Program, Government of the United States of America - National Institutes of Health (NIH), Government of the United States of America - Laboratory of Genetics and Genomics, Government of the United States of America - National Institute on Aging (NIA), Johns Hopkins University, Northwestern University - Feinberg School of Medicine, Georgetown University, Johns Hopkins University - Department of Biomedical Engineering, Johns Hopkins University, Harvard University - Beth Israel Deaconess Medical Center, University of California, Los Angeles (UCLA), Johns Hopkins University - Department of Epidemiology, Johns Hopkins University, Government of the United States of America - Translational Gerontology Branch, Johns Hopkins University, Johns Hopkins University, School of Medicine, Division of Endocrinology, Diabetes, & Metabolism, Johns Hopkins University - School of Medicine and Johns Hopkins University - Johns Hopkins Hospital