- Correspondence to Dr Akiko Narita, Department of Ophthalmology, Okayama Saiseikai General Hospital, 2-25 Kokutai-cho Kita-ku Okayama 700-8511, Japan;
- Received May 6, 2017
- Revised July 18, 2017
- Accepted August 16, 2017
- First published September 11, 2017.
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