1. Department of Medicine (A.R.), Johns Hopkins University School of Medicine and Johns Hopkins Bayview Medical Center, Baltimore, Maryland 21224
2. Laboratory of Clinical Investigation at the National Institutes of Health (D.C.M., M.R.B., R.A.), National Institute on Aging, Baltimore, Maryland 21224
3. Laboratory of National Institute on Aging (E.J.M., M.M., S.M.H., M.R.B.), National Institutes of Health, Baltimore, Maryland 21224
4. Laboratory of Kronos Longevity Research Institute (S.M.H.), Phoenix, Arizona 85013
5. Laboratory of Clinical Investigation (M.R.B.), National Center for Complementary and Alternative Medicine, National Institutes of Health, Bethesda, Maryland 20892