García, Gabriela http://orcid.org/0000-0003-4621-0794
Ramos, Fernando
Martínez-Hernández, Fernando
Hernández, Lilian
Yáñez, Jorge
Gaytán, Paul
Article History
Received: 10 November 2017
Accepted: 31 January 2018
First Online: 10 February 2018
Compliance with ethical standards
: The Ethics and Scientific research committees of the Medicine School of the University of Mexico (UNAM) approved the protocol for this study (projects 042-2011, 151/2014 and 008/2016)