1. From the Norwich Medical School (P.K.M.), Health and Social Science Research Institute, Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, United Kingdom; Academic Department of Medicine for the Elderly (P.K.M.), Norfolk and Norwich University Hospital, Norwich, United Kingdom; Clinical Gerontology Unit (P.K.M., R.N.L., K.-T.K.), Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom; Medical Research Council Epidemiology Unit (N.J...