Alessandra D’Alessandro, Marcella Pesce, Rosario Cuomo, Giovanni Sarnelli, Department of Clinical Medicine and Surgery, Gastroenterology Unit, Federico II University, 80131 Naples, Italy
Dario Esposito, Giovanni Domenico De Palma, Department of Clinical Medicine and Surgery, Endoscopy Unit, Federico II University, 80131 Naples, Italy
Author contributions: D’Alessandro A, Esposito D and Pesce M reviewed literature data and wrote the manuscript; Cuomo R and De Palma GD participate to the critical revision of the manuscript; Sarnelli G designed, coordinated and revised the manuscript.
Conflict-of-interest statement: All the authors declare that they have no competing 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: Giovanni Sarnelli, MD, PhD, Department of Clinical Medicine and Surgery, Gastroenterology Unit, Federico II University of Naples, Via Sergio Pansini, 5, 80131 Naples, Italy. firstname.lastname@example.org
Telephone: +39-081-7464290 Fax: +39-081-7464290
Received: May 25, 2015
Peer-review started: May 28, 2015
First decision: July 27, 2015
Revised: July 30, 2015
Accepted: September 25, 2015
Article in press: September 28, 2015
Published online: November 15, 2015