- Correspondence to Dr Ho-Seok Sa, Department of Ophthalmology, Asan Medical Center, University of Ulsan, College of Medicine, 388-1 Pungnap-2-dong, Songpa-gu, Seoul 138-736, Korea;
- Received May 28, 2013
- Revised September 1, 2013
- Accepted September 29, 2013
- First published October 17, 2013.
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