- Correspondence to Dr Giordano Pérez-Gaxiola, Hospital Pediátrico de Sinaloa, Blvd. Constitución s/n, Col. Almada, Culiacán 80200, Sinaloa, Mexico;
- Received 4 December 2015
- Revised 22 March 2016
- Accepted 24 March 2016
- Published in print 1 October 2016.
- Published online 19 September 2016.
- Published first 15 April 2016.
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