Funding for this research was provided by:
Agencia Nacional de Promoción de Ciencia y Técnica (PICT-2013-1554)
Consejo Nacional de Ciencia y Tecnología (19612)
Ministerio de Relaciones Exteriores (FO-AR-5790)
Agencia Mexicana de Cooperación Internacional para el Desarrollo
Received: 18 August 2017
Accepted: 28 November 2017
First Online: 22 January 2018
Ethics approval and consent to participate
: This study was approved by the Instituto Nacional de Salud Pública, México Institutional Bioethical Committee (approval No. 1681).
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.