1. Department of Intensive Care, Blacktown Hospital, Sydney, Australia
2. Department of Intensive Care, Nepean Hospital, Sydney, Australia
3. Junior Medical Staff Unit, Royal North Shore Hospital, Sydney, Australia
4. South Western Sydney Clinical School, University of New South Wales, Sydney, Australia
5. Department of Neurosurgery, Wollongong Hospital, Wollongong, Australia
6. Department of Intensive Care Medicine, Liverpool Hospital, Sydney, Australia
7. Department of Anaesthesia, Liverpool Hospital, Sydney, Australia