1. Clinical Epidemiology and Health Service Evaluation Unit, Melbourne Health, Melbourne, VIC.
2. Centre of Research Excellence in Patient Safety, Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, VIC.
3. Clinical Liaison Service, Victorian Institute of Forensic Medicine and Department of Forensic Medicine, Monash University, Melbourne, VIC.
4. Princess Alexandra Hospital, Brisbane, QLD.
5. University of Queensland, Brisbane, QLD.