1. Avonmead Unit, Southmead Hospital, Bristol, UK
2. National Ageing Research Institute, Melbourne Extended Care and Rehabilitation Service, Melbourne, Australia
3. Department of Medicine, University of Western Australia, Royal Perth Hospital, Geriatric Medicine, Perth, Australia
4. Lilley Lodge Nursing Home, Long Gully, Australia
5. National Ageing Research Institute, Melbourne, Australia
6. Department of Psychiatry, University of Melbourne Department of Psychiatry, Royal Melbourne Hospital, Parkville, Victoria, 3050, Australia