[1] Univ Tasmania, Sch Med, Hobart, Tas, Australia
[2] Australian Govt, Dept Hlth, Hobart, Tas, Australia
[3] Univ Newcastle, Sch Med & Publ Hlth, Callaghan, NSW, Australia
[4] GP Synergy, NSW & ACT Res & Evaluat Unit, Mayfield West, NSW, Australia
[5] Hunter Med Res Inst HMRI, Clin Res Design & Stat Support Unit CReDITSS, New Lambton Hts, NSW, Australia
[6] Australian Gen Practice Training, Gen Practice Training Tasmania GPTT, Hobart, Tas, Australia
[7] Australian Gen Practice Training, Eastern Victoria Gen Practice Training EVGPT, Hawthorn, Vic, Australia
[8] Monash Univ, Sch Rural Hlth, Churchill, Vic, Australia
[9] Univ Melbourne, Dept Gen Practice & Primary Hlth Care, Carlton, Vic, Australia
[10] Univ Queensland, Fac Med, Gen Practice Clin Unit, Brisbane, Qld, Australia
[11] Univ Newcastle, Sch Med & Publ Hlth, Univ Dr, Callaghan, NSW 2308, Australia