- Correspondence to Dr Muhammad Bayu Sasongko, Ophthalmology, Faculty of Medicine Public Health and Nursing, Universitas Gadjah Mada—Dr Sardjito General Hospital, Yogyakarta, Indonesia;
- Received January 30, 2019
- Revised May 10, 2019
- Accepted June 10, 2019
- First published July 8, 2019.
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