[1] Alfred Hlth, Emergency & Trauma Ctr, 55 Commercial Rd, Melbourne, Vic 3004, Australia
[2] Monash Univ, Sch Publ Hlth & Prevent Med, Melbourne, Vic, Australia
[3] Port Moresby Gen Hosp, Emergency Dept, Port Moresby, Papua N Guinea
[4] Johnstaff Int Dev, Melbourne, Vic, Australia
[5] Townsville Univ Hosp, Emergency Dept, Townsville, Qld, Australia
[6] James Cook Univ, Coll Med & Dent, Townsville, Qld, Australia
[7] Australasian Coll Emergency Med, Melbourne, Vic, Australia