1. Department of Anaesthesia, Pain Medicine and Hyperbaric Medicine, Royal Adelaide Hospital and Discipline of Pharmacology, School of Medical Sciences and Discipline of Acute Care Medicine, University of Adelaide, Adelaide, South Australia and Department of Anaesthesia and Pain Management, Sir Charles Gairdner Hospital, Nedlands, Western Australia, Australia
2. Department of Anaesthesia, Pain Medicine and Hyperbaric Medicine, Royal Adelaide Hospital.
3. Department of Anaesthesia and Pain Management, Sir Charles Gairdner Hospital.
4. Discipline of Pharmacology, School of Medical Sciences, University of Adelaide.
5. Department of Anaesthesia, Pain Medicine and Hyperbaric Medicine, Royal Adelaide Hospital and Associate Professor, Discipline of Acute Care Medicine, University of Adelaide.