1. Department of Ophthalmology, Phramongkutklao College of Medicine, Bangkok, Thailand
2. Department of Ophthalmology, Phramongkutklao Hospital, Bangkok, Thailand
3. Department of Ophthalmology, Mettapracharak Hospital, Nakhon Pathom, Thailand
4. Department of Ophthalmology & Visual Sciences, University of Adelaide, Adelaide, Australia
5. South Australian Institute of Ophthalmology, Royal Adelaide Hospital, Adelaide, Australia