Funding for this research was provided by:
Consejo Nacional de Ciencia y Tecnología (FONSEC0 2014-1-233347)
Mexican Foundation for Health, Peninsular Chapter (S/N)
Text and Data Mining valid from 2018-07-03
Received: 9 January 2018
Accepted: 7 June 2018
First Online: 3 July 2018
Ethics approval and consent to participate
: This study was approved by and conducted in accordance with the two participating centers (Hospital General O'Horán (CEI-0-070-1-14, approved 20th July 2014). and Center for Research and Advanced Studies of the National Polytechnic Institute (012/2014 December 2014.) Institutional Ethics Committees recommendations. Participating subjects gave written informed consent in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.
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