[1] Natl Ageing Res Inst, Parkville, Vic 3052, Australia
[2] Univ Auckland, Dept Gen Practice & Primary Hlth Care, Auckland 1, New Zealand
[3] Dept Human Serv, Aged Community & Mental Hlth Div, Melbourne, Vic, Australia
[4] Latrobe Univ, Sch Publ Hlth, Bundoora, Vic, Australia
[5] Flinders Univ S Australia, Res Ctr Injury Studies, Natl Injury Surveillance Unit, Australian Inst Hlth & Welf, Bedford Pk, SA 5042, Australia
[6] Flinders Univ S Australia, Fac Hlth Sci, Ctr Ageing Studies, Bedford Pk, SA 5042, Australia