1. From the Department of Medicine, Obesity and Diabetes Research Centers (M.L., B.B.H., X.J.X., N.B.R., O.S.S.), Cardiovascular Section (I.L., F.Q., D.A.S., Z.Z., D.R.P., W.S.C.), and Pulmonary Center (K.D.H., S.R.D.), Mitochondria ARC, Boston University School of Medicine; Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School (E.S.); and Division of Laboratory Animal Medicine, Tufts University (L.R), Boston, MA.