- 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 November 21, 2016
- Revised January 14, 2017
- Accepted February 7, 2017
- First published March 14, 2017.
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