1. From the Coventry University/Warwick West Midlands Primary Care Network, Coventry, UK (S.E.L.); Laboratory of Clinical Epidemiology, INRCA Geriatric Department, Florence, Italy (L.F.); Sezione Di Medicina Interna, Unversitá Degli Studi Di Ferrara, Ferrara, Italy (S.V.); The Johns Hopkins University Medical Institutions, Baltimore, Md (L.P.F.); and Epidemiology, Demography and Biometry Program, National Institute on Aging, Bethesda, Md (J.M.G.).