Document is current

Article History

Received: 3 March 2021

Accepted: 24 June 2021

First Online: 21 July 2021

Declarations

:

: The Ethics and Research Committee of the National Institute of Public Health in Mexico (record number 767) approved this project and authorized verbal informed consent for all informants. The use of verbal informed consent was suggested by the Institute of Basic Education of the State of Morelos. They recommended that mothers authorize their children’s participation orally because many have poor reading habits and/or they could be apprehensive about signing documents. In addition, to avoid differences in how the research was implemented, they suggested using verbal consent for all informants. Therefore, we requested verbal consent from teachers, parents of minors (under the age of 18), and adolescents.Only those informants who freely agreed to participate were included in the study. We confirm that all methods in the present study were carried out in accordance with relevant guidelines and regulations.

: We grant publication rights to BMC Public Health.

: The authors declare no conflict of interests.