- Correspondence to Dr Chang-sik Kim, Department of Ophthalmology, Chungnam National University Hospital, #282 Munhwa-ro, Jung-gu, Daejeon 301-721, Korea;
- Received March 15, 2015
- Revised August 25, 2015
- Accepted October 3, 2015
- First published October 27, 2015.
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