1. Department of Anaesthesia, Pain Medicine and Hyperbaric Medicine, Royal Adelaide Hospital, Adelaide, South Australia
2. Acute Pain Service, Department of Anaesthesia, Pain Medicine and Hyperbaric Medicine, Royal Adelaide Hospital, Adelaide, Discipline of Acute Care Medicine, University of Adelaide, Adelaide, South Australia
3. Department of Anaesthesia, Queen Elizabeth Hospital, Adelaide, South Australia
4. Department of Forensic Medicine, Monash University, Melbourne, Victoria