- Correspondence to Dr Yuko Hoshikawa, Department of Ophthalmology, St Luke's International Hospital, 9–1, Akashi-cho, Chuo-ku, Tokyo 104-8560, Japan;
- Received April 16, 2013
- Revised July 18, 2013
- Accepted August 3, 2013
- First published September 24, 2013.
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