Text and Data Mining valid from 2019-08-14
Received: 18 December 2017
Accepted: 8 July 2019
First Online: 14 August 2019
Ethics approval and consent to participate
: This protocol was approved by the Human Research and Ethics Committee of the Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (reference 1407).Not applicable because it is a retrospective study.
: Not applicable.
: All authors declare not having any conflict of interest related to this investigation.