1. Center for Health Sciences (H.Z.R., C.N.L., G.E.S., D.C.), SRI International, Menlo Park, California 94025
2. Department of Medical and Molecular Genetics (T.R.), Indiana University School of Medicine, Indianapolis, Indiana 46202
3. Department of Medicine (R.M., L.H.), Stanford University School of Medicine, The Geriatrics Research, Education and Clinical Center, Veterans Affairs Palo Alto Health Care System, Palo Alto, California 94304