- Correspondence to Dr Marion R Munk, Department of Ophthalmology; Inselspital, University Hospital Bern, Bern, Switzerland, Freiburgstrasse 4, Bern 3010, Switzerland;
- Received July 5, 2014
- Revised February 2, 2015
- Accepted February 15, 2015
- First published March 4, 2015.
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