Marván, Ma. Luisa http://orcid.org/0000-0002-0670-2260
Espinosa-Hernández, Graciela
Orihuela-Cortés, Fabiola
Article History
First Online: 26 June 2018
Compliance with Ethical Standards
:
: The authors declare they have no conflict of interest.
: All procedures performed in this study were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments.
: Informed consent was obtained from all participants included in the study and from their parents.