1. Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
2. Department of Ophthalmology, Salmaniya Medical Complex, Government Hospitals, Manama 435, Bahrain
3. Department of Ophthalmology, Tung Wah Eastern Hospital, Hong Kong SAR, China
4. Department of Ophthalmology and Visual Sciences, Prince of Wales Hospital, Hong Kong SAR, China
5. Department of Statistics, The Chinese University of Hong Kong, Hong Kong SAR, China
6. Department of Imaging and Interventional Radiology, Faculty of Medicine, The Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong SAR, China