1 School of Public Health, University of Adelaide, 5000 Adelaide, Australia. Electronic address: elsa.dent@adelaide.edu.au.
2 Gérontopôle, Department of Internal Medicine and Geriatrics, Toulouse University Hospital, Toulouse, France; Department of General Practice and Elderly Care Medicine and Department of Epidemiology and Biostatistics, Institute for Health and Care Research, VU University Medical Center, Amsterdam, Netherlands.
3 Simpson Centre for Health Services Research, University of New South Wales, Sydney, NSW, Australia.
4 Simpson Centre for Health Services Research, University of New South Wales, Sydney, NSW, Australia; Liverpool Hospital, South Western Sydney Clinical School, Sydney, NSW, Australia.