Susana Llerena, María Teresa Arias-Loste, Angela Puente, Joaquín Cabezas, Javier Crespo, Emilio Fábrega, Gastroenterology and Hepatology Unit, Marqués de Valdecilla University Hospital, Instituto de Investigación Marqués de Valdecilla, 39008 Santander, Cantabria, Spain
Author contributions: Llerena S, Arias-Loste MT, Puente A, Cabezas J, Crespo J and Fábrega E contributed equally to this work; Llerena S and Fábrega E wrote the paper.
Conflict-of-interest statement: The authors of the present manuscript declare no conflict of interests.
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: Emilio Fábrega, MD, PhD, Gastroenterology and Hepatology Unit, Marqués de Valdecilla University Hospital, Instituto de Investigación Marqués de Valdecilla, Avenida Valdecilla s/n, 39008 Santander, Cantabria, Spain. firstname.lastname@example.org
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Received: April 27, 2015
Peer-review started: May 4, 2015
First decision: October 21, 2015
Revised: October 26, 2015
Accepted: November 10, 2015
Article in press: November 11, 2015
Published online: November 28, 2015