1 National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore, Republic of Singapore; Moorfields Eye Hospital and Biomedical Research Centre, Institute of Ophthalmology, University College London, London, UK; Singapore Eye Research Institute, Singapore, Republic of Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore; Duke NUS Medical School, Singapore.
2 Moorfields Eye Hospital and Biomedical Research Centre, Institute of Ophthalmology, University College London, London, UK.
3 Byers Eye Institute, Stanford Medical School, California.
4 Advanced Eye Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India. Electronic address: vishalisara@yahoo.co.in.