Campos-Uscanga, Yolanda
Gutiérrez-Ospina, Gabriel
Morales-Romero, Jaime
Romo-González, Tania
Article History
Received: 27 June 2016
Accepted: 20 October 2016
First Online: 31 October 2016
Compliance with ethical standards
:
: This study was not funded.
: All authors declare that there are no conflicts of interest.
: All procedures performed with the participants were in accordance with the ethical standards and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The College of Researchers at the Institute of Public Health of the Universidad Veracruzana reviewed and approved the protocols used to gather the data.
: An informed consent was obtained from all individual participants included in the study.