Received: 12 September 2019
Accepted: 24 January 2020
First Online: 5 February 2020
Ethics approval and consent to participate
: All procedures involving human participants were in accordance to the ethical standards of the Institutional Research Committee and with the 1964 Helsinki Declaration and its later amendments. The protocol was approved by the local ethical committee of health investigation of Hospital de Especialidades Centro Médico Nacional Siglo XXI. Instituto Mexicano del Seguro Social. Number of registration R-2018 3601–010. Written informed consent was obtained from all individual participants.
: Not applicable.
: Co-author Aldo Ferreira-Hermosillo is an Associate Editor of this journal, and he had no role in the handling of this manuscript through to publication.