- Correspondence to Dr Songtao Yuan, Department of Ophthalmology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China; and Weizhong Ge, Department of Ophthalmology, Yixing People’s Hospital, Yixing 214200, China;
- Received July 24, 2017
- Revised September 13, 2017
- Accepted September 30, 2017
- First published October 31, 2017.
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