Funding for this research was provided by:
Consejo Nacional de Ciencia y Tecnología (SALUD-2004-119, project 31041-M, CB29005-M)
Text and Data Mining valid from 2019-02-20
Received: 7 September 2018
Accepted: 31 January 2019
First Online: 20 February 2019
Ethics approval and consent to participate
: The present protocol was approved by the research and ethics committees of the National Institute of Public Health, Mexico (INSP). All participating adults gave informed consent. In the case of minors, informed consent was obtained from the parents or guardians prior to taking a blood sample.
: Not applicable.
: The authors declare that there are no competing interests.
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