- Correspondence to Professor Saeed Akhtar, Cornea Research Chair, Department of Optometry, College of Applied Medical Sciences, King Saud University, PO Box 10219, Riyadh 11433, Saudi Arabia;
- Received October 22, 2016
- Revised January 2, 2017
- Accepted February 28, 2017
- First published April 17, 2017.
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