Funding for this research was provided by:
Consejo Nacional de Ciencia y Tecnología (235855, 235964, 272390)
Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México (IN223915)
Text and Data Mining valid from 2019-05-08
Received: 6 August 2018
Accepted: 29 April 2019
First Online: 8 May 2019
Ethics approval and consent to participate
: The protocol was approved by the Committee on Ethics Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán.
: Not applicable
: The authors declare that they have no competing interests.
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