Antonietta Gerarda Gravina, Cristiana De Musis, Lorenzo Romano, Carmelina Loguercio, Marco Romano, Dipartimento di “Medicina di Precisione”, UOC Epatogastroenterologia, Università della Campania “Luigi Vanvitelli”, Napoli 80131, Italy
Rocco Maurizio Zagari, Dipertimento Di Scienze Mediche e Chirurgiche, Università di Bologna, Bologna 40138, Italy
Author contributions: Gravina AG designed and wrote the manuscript; Zagari RM, Romano M and Loguercio C designed and revised the manuscript; De Musis C and Romano L contributed to the literature search. All authors equally contributed to this paper with the conception and design of the study, literature review and analysis, drafting and critical revision and editing, and final approval of the final version.
Conflict-of-interest statement: The authors have no conflicts of interest and no financial support.
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: Marco Romano, MD, PhD, Full Professor, Dipartimento di “Medicina di Precisione”, UOC Epatogastroenterologia, Università degli Studi della Campania “Luigi Vanvitelli”, Via Pansini, 5, Napoli 80131, Italy. email@example.com
Received: April 9, 2018
Peer-review started: April 9, 2018
First decision: April 26, 2018
Revised: May 19, 2018
Accepted: June 27, 2018
Article in press: June 27, 2018
Published online: August 7, 2018