- Correspondence to Professor Sung Soo Kim, Department of Ophthalmology, Severance Hospital, Institute of Vision Research, Yonsei University College of Medicine, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Korea; and Professor Tien Yin Wong, Singapore National Eye Centre, 11 Third Hospital Avenue, Singapore 168751;
- Received 21 November 2016
- Revised 14 January 2017
- Accepted 7 February 2017
- Published in print 1 October 2017.
- Published online 26 September 2017.
- Published first 14 March 2017.
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