[1] Monash Univ, Monash Hlth, Sch Publ Hlth & Prevent Med, MCHRI, Locked Bag 29, Clayton, Vic 3168, Australia
[2] Ambulance Victoria, Res & Evaluat, 31 Joseph St, Blackburn North, Vic 3130, Australia
[3] Monash Hlth, Diabet & Vasc Med Unit, Clayton, Vic 3168, Australia
[4] Univ Western Australia, Sch Primary Aboriginal & Rural Hlth Care, Dept Emergency Med, Crawley, WA 6009, Australia
[5] Monash Univ, Sch Primary Hlth Care, Notting Hill, Vic 3168, Australia
[6] RDNS Inst, Royal Dist Nursing Serv, St Kilda, Vic 3182, Australia
[7] George Inst Global Hlth, Camperdown, NSW 2050, Australia