Jaime Toral-López, Departamento de Genética Médica, Centro Médico Ecatepec, Instituto de Seguridad Social del Estado de México y Municipios, Ecatepec, Estado de México CP 55000, México
Luz María González-Huerta, Sergio A Cuevas-Covarrubias, Departamento de Genética Médica, Hospital General de México/Facultad de Medicina, Universidad Nacional Autónoma de México, Ciudad de México CP 06726, México
Author contributions: Toral-López J, González-Huerta LM and Cuevas-Covarrubias SA performed the review.
Conflict-of-interest statement: The authors declare no conflict of interest.
Open-Access: This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Correspondence to: Dr. Sergio A Cuevas-Covarrubias, Departamento de Genética Médica, Hospital General de México/Facultad de Medicina, Universidad Nacional Autónoma de México, Dr. Balmis 148 Col. Doctores, Ciudad de México CP 06726, México. email@example.com
Telephone: +52-55-27892000 Fax: +52-55-53412821
Received: November 22, 2014
Peer-review started: November 22, 2014
First decision: January 8, 2015
Revised: May 8, 2015
Accepted: May 27, 2015
Article in press: May 28, 2015
Published online: August 2, 2015