Funding for this research was provided by:
Universidad Autónoma del Estado de México (4732/2019CIB)
Text and Data Mining valid from 2019-03-16
Received: 31 August 2018
Accepted: 11 March 2019
First Online: 16 March 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest. Our study received the field permits and the approval of the ethics committee from Universidad Autónoma del Estado de México and SEMARNAT (SGPA/DGVS/05701/16).