Higareda-Almaraz, M A
Loza-Barajas, H
Maldonado-González, J G
Higareda-Almaraz, E
Benítez-Godínez, V
Murillo-Zamora, E
Article History
Received: 25 January 2016
Revised: 21 April 2016
Accepted: 17 May 2016
First Online: 16 June 2016
Competing interests
: The authors declare no conflict of interest.