1. Department of Anaesthetics, Royal Prince Alfred Hospital, Camperdown, Australia
2. Department of Intensive Care Medicine, Westmead Hospital, Westmead, Australia
3. Department of Ophthalmology, Royal Prince Alfred Hospital, Camperdown, Australia
4. Department of Anaesthesia, Khoo Teck Puat Hospital, Singapore
5. Newcastle University, Newcastle upon Tyne, UK
6. Newcastle University Medical School, Johor, Malaysia