1. From the Departments of Medicine (M.M.M.), Preventive Medicine (M.M.M., K.L.), and Surgery (M.K.), Northwestern University’s Feinberg School of Medicine, Chicago, IL; Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore (J.M.G.); Department of Family and Preventive Medicine University of California at San Diego, San Diego (M.H.C.); and Longitudinal Studies Section, National Institute on Aging, Baltimore, MD (L.F.).