- Correspondence to Dr Otavio Magalhaes, Department of Ophthalmology, Surgery Postgraduate Program—Federal University of Rio Grande do Sul, Clinical Hospital of Porto Alegre, 333 Mostardeiro Street, Office 503, Porto Alegre, RS 90430-001, Brazil;
- Received April 29, 2013
- Revised July 31, 2013
- Accepted August 17, 2013
- First published September 5, 2013.
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