- Correspondence to Dr Giordano Pérez-Gaxiola, Hospital Pediátrico de Sinaloa, Blvd. Constitución s/n, Col. Almada, Culiacán 80200, Sinaloa, Mexico;
- Received December 4, 2015
- Revised March 22, 2016
- Accepted March 24, 2016
- First published April 15, 2016.
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