Hernández-Cordero, S
Cuevas-Nasu, L
Morales-Ruán, M C
Méndez-Gómez Humarán, I
Ávila-Arcos, M A
Rivera-Dommarco, J A
Article History
Received: 22 March 2016
Revised: 11 August 2016
Accepted: 1 November 2016
First Online: 13 March 2017
Competing interests
: The authors declare no conflict of interest.