1. Departments of Anaesthesia, Green Lane Hospital, Auckland and Wellington Hospital, Wellington, New Zealand
2. Clinical Associate Professor, Department of Anaesthesia, Green Lane Hospital and Department of Pharmacology, School of Medicine, University of Auckland, Auckland, New Zealand.
3. Research Officer, Department of Anaesthesia, Green Lane Hospital, Auckland, New Zealand.
4. Specialist Anaesthetist, Department of Anaesthesia, Wellington Hospital, Wellington, New Zealand.