Hideki Mori, Department of Clinical and Experimental Medicine, Translational Research Center for Gastrointestinal Disorders, University of Leuven, Leuven 3000, Belgium
Hidekazu Suzuki, Division of Gastroenterology and Hepatology, Department of Internal Medicine, Tokai University School of Medicine, Isehara 259-1193, Japan
Author contributions: All authors equally contributed to this paper with 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: During the last 3 years, Suzuki H received scholarship funds for the research from Daiichi-Sankyo Co., EA Pharma Co., Otsuka Pharmaceutical Co. Ltd., and Tsumura Co., and received service honoraria from Astellas Pharma Inc, AstraZeneca K.K., Daiichi-Sankyo Co., EA Pharma Co., Otsuka Pharmaceutical Co. Ltd., Mylan EPD Co., Takeda Pharmaceutical Co., Ltd., Tsumura, Co. and Zeria Pharmaceutical Co. Ltd.
Open-Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (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/
Corresponding author: Hideki Mori, MD, PhD, Doctor, Postdoctoral Fellow, Department of Clinical and Experimental Medicine, Translational Research Center for Gastrointestinal Disorders, University of Leuven, Herestraat 49 Box 701, Leuven 3000, Belgium. firstname.lastname@example.org
Received: December 30, 2019
Peer-review started: December 30, 2019
First decision: February 29, 2020
Revised: March 5, 2020
Accepted: April 4, 2020
Article in press: April 4, 2020
Published online: April 21, 2020