- Correspondence to Professor I Stalmans, Department of Ophthalmology, University Hospitals Leuven, Campus St Raphaël, Kapucijnenvoer 33, Leuven B-3000, Belgium;
- Received July 4, 2013
- Revised August 24, 2013
- Accepted September 14, 2013
- First published October 24, 2013.
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