[1] Peninsula Hlth, Dept Intens Care, Melbourne, Vic, Australia
[2] Peninsula Hlth, Dept Informat Technol, Melbourne, Vic, Australia
[3] Peninsula Hlth, Dept Med, Melbourne, Vic, Australia
[4] Monash Univ, Peninsula Clin Sch, Melbourne, Vic, Australia
[5] Monash Univ, Australian & New Zealand Intens Care Res Ctr, Dept Epidemiol & Prevent Med, Melbourne, Vic, Australia
[6] Alfred Hosp, Dept Intens Care, Melbourne, Vic, Australia
[7] Australian & New Zealand Intens Care Soc, Ctr Outcome & Resource Evaluat, Melbourne, Vic, Australia