1. Department of Anaesthetics, Royal Prince Alfred Hospital, Camperdown, Australia
2. Department of Anaesthetic, Khoo Teck Puat Hospital, Singapore
3. Newcastle University, Newcastle upon Tyne, UK
4. Newcastle University Medical School, Johor, Malaysia
5. Department of Ophthalmology, Royal Prince Alfred Hospital, Camperdown, Australia
6. Department of Ophthalmology, Norfolk and Norwich University Hospital, Norwich, UK