[1] Monash Univ, Ctr Med Use & Safety, Parkville, Vic 3052, Australia
[2] Univ Melbourne, Royal Melbourne Hosp, Dept Med, Parkville, Vic 3050, Australia
[3] Monash Infect Dis, Monash Hlth, Clayton, Vic, Australia
[4] Monash Univ, Dept Med, Clayton, Vic, Australia
[5] Royal Melbourne Hosp, Victorian Infect Dis Serv, Parkville, Vic, Australia
[6] St Vincents Hosp, Dept Infect Dis, Fitzroy, Vic, Australia
[7] Dept Infect Dis, Barwon Hlth, Geelong, Vic, Australia
[8] Victoria Hlthcare Assoc Infect Surveillance, Syst Co ordinating Ctr, North Melbourne, Vic, Australia
[9] Dept Infect Dis, Alfred Hlth, Melbourne, Vic, Australia
[10] Monash Univ, Dept Epidemiol & Prevent Med, Melbourne, Vic 3004, Australia
[11] Monash Univ, Dept Microbiol, Clayton, Vic 3168, Australia