- Correspondence to Dr Ya Xing Wang and Dr Jost B Jonas, Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, 17 Hougou Lane, Chong Wen Men, Beijing 100005, China;
- Received November 1, 2015
- Revised February 28, 2016
- Accepted March 3, 2016
- First published March 25, 2016.
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