Funding for this research was provided by:
Received: 28 August 2020
Accepted: 15 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: Approval to conduct this study was obtained from the Institutional Ethics Committee at the Universidad Autónoma de Guerrero and the Instituto Estatal de Cancerología from Guerrero State (General agreement UAGro-IECan 04/18/2016). All participants signed an informed consent.
: Not applicable.
: The authors declare that they have no competing interests.