1. Western Australian Centre for Health and Ageing (Y.Y.E.W., K.A.M., L.F.), Centre for Medical Research, Western Australia Institute for Medical Research, Crawley, Western Australia 6009, Australia
2. School of Medicine and Pharmacology (Y.Y.E.W., K.A.M., B.B.Y., L.F.), University of Western Australia, Perth, Western Australia 6000, Australia
3. Department of Endocrinology and Diabetes (B.B.Y.), Fremantle Hospital, Perth, Western Australia 6160, Australia
4. Departments of Neurology (G.J.H.), Western Australia 6000, Australia
5. Geriatric Medicine (L.F.), Royal Perth Hospital, Perth, Western Australia 6000, Australia