1. From the Rehabilitation and Ageing Studies Unit, Department of Medicine, Flinders University of South Australia, Daw Park, South Australia (C.A., S.R., M.C.); the Clinical Trials Research Unit, Department of Medicine, University of Auckland, Auckland, New Zealand (C.A., C.N.M.); and the Southern Domiciliary Care and Rehabilitation Service, Adelaide, South Australia (C.S., A.W.).