[1] Univ Newcastle, Sch Med & Publ Hlth, Callaghan, NSW 2308, Australia
[2] Univ Newcastle, Prior Res Ctr Hlth Behav, Callaghan, NSW 2308, Australia
[3] Hunter Med Res Inst, New Lambton Hts, NSW 2305, Australia
[4] Hunter Med Res Inst, Univ Dr, Callaghan, NSW 2308, Australia
[5] Curtin Univ, Curtin Med Sch, Bentley, WA 6102, Australia
[6] Northern Terr Dept Hlth, Darwin, NT 0800, Australia
[7] Univ Sydney, Sch Med, Fac Hlth & Med, Sydney, NSW 2006, Australia
[8] Univ Newcastle, Fac Hlth & Med, Callaghan, NSW, Australia
[9] Bolton Clarke Res Inst, Bentleigh, Vic 3204, Australia
[10] NSW Consumer Reference Grp, Consumer Dementia Res Network, N Ryde, NSW 2113, Australia