1 International Eye Cataract Retina Centre, Mount Elizabeth Medical Centre and Farrer Park Medical Centre, Singapore, Singapore.
2 Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.
3 International Eye Cataract Retina Centre, Mount Elizabeth Medical Centre and Farrer Park Medical Centre, Singapore, Singapore. aueongkahguan@gmail.com.
4 Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore. aueongkahguan@gmail.com.
5 Department of Ophthalmology and Visual Sciences, Khoo Teck Puat Hospital, Singapore, Singapore. aueongkahguan@gmail.com.