Text and Data Mining valid from 2018-07-18
Received: 23 April 2018
Accepted: 21 June 2018
First Online: 18 July 2018
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of the Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán.
: “Not applicable”.
: The authors declare that they have no competing interests.
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