- Correspondence to Dr Chieh-Chih Tsai, Department of Ophthalmology, Taipei Veterans General Hospital, No. 201, Sec.2, Shih-Pai Road, Taipei 11217, Taiwan;
- Received July 16, 2015
- Revised October 22, 2015
- Accepted November 22, 2015
- First published December 23, 2015.
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