1. South Australian Institute of Ophthalmology, Department of Ophthalmology and Visual Sciences, Adelaide University, Adelaide, South Australia, Australia
2. Department of Surgery–Otorhinolaryngology, Head and Neck Surgery, University of Adelaide, Adelaide, South Australia, Australia
3. Department of Ophthalmology, Greenlane Clinical Centre, Auckland, New Zealand
4. Department of Ophthalmology, Prince of Wales Hospital, Sydney, New South Wales, Australia
5. Department of Ophthalmology, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia