Quinzaños-Fresnedo, J
Rodríguez-Reyes, G
Mendoza-Cosío, C
Pérez-Zavala, R
Márquez-Guitérrez, E A
Hernández-Sandoval, S
Article History
Received: 7 July 2015
Accepted: 7 July 2015
First Online: 8 October 2015
Competing interests
: The authors declare no conflict of interest.
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