- Correspondence to Dr Irmela Mantel, Department of Ophthalmology, University Eye Hospital Jules Gonin, 15 Av. de France, Case postale 133, CH-1000 Lausanne 7, Switzerland;
- Received October 30, 2013
- Revised February 19, 2014
- Accepted March 20, 2014
- First published April 10, 2014.
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