- Correspondence to Dr Mina Chung, Flaum Eye Institute, University of Rochester, 601 Elmwood Ave Box 659, Rochester, NY 14642, USA; and Dr Hongxin Song, Beijing Institute of Ophthalmology, Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Key Laboratory of Ophthalmology and Visual Sciences, National Engineering Research Center for Ophthalmic Equipment, 17 Hou Gou Lane, Beijing 100005, China;
- Received 21 March 2017
- Revised 1 July 2017
- Accepted 14 August 2017
- Published online 26 October 2017.
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