1. From the Department of Medical Statistics, Informatics, and Health Economics, Innsbruck Medical University, Innsbruck, Austria (E.R., H.U.); Gerontology Research Center, National Institute on Aging, Baltimore, Md (L.J.B.); Agency for Preventive and Social Medicine, Bregenz, Austria (H.C., G.D., H.U.); and Department of Epidemiology, University of Ulm, Ulm, Germany (K.R.).