Funding for this research was provided by:
International Development Research Centre (107731-001)
National Council of Science (SALUD-2011-1-160496)
Text and Data Mining valid from 2018-04-07
Received: 1 September 2017
Accepted: 26 March 2018
First Online: 7 April 2018
Ethics approval and consent to participate
: This study was approved by the Comité de Ética en Investigación of the INSP.
: The authors of this paper have no conflict of interest regarding sources of funding. CONACYT (study sponsor) had no role in study design; collection, analysis, and interpretation of data; writing the report, and the decision to submit the report for publication.
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