- Correspondence to Dr R C Preti, Division of Ophthalmology, University of São Paulo Medical School, Av Ramalho Ortigão, 269 apartamento 54—Vila Gumercindo, São Paulo 04130010, Brazil;
- Received October 3, 2012
- Revised April 1, 2013
- Accepted April 14, 2013
- First published May 17, 2013.
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