Ryota Masuzaki, Tatsuo Kanda, Reina Sasaki, Naoki Matsumoto, Kazushige Nirei, Masahiro Ogawa, Mitsuhiko Moriyama, Division of Gastroenterology and Hepatology, Department of Medicine, Nihon University School of Medicine, Tokyo 173-8610, Japan
Author contributions: Masuzaki R and Kanda T contributed to the conceptualization; Masuzaki R contributed to original draft preparation; Kanda T contributed to reviewing and editing; Sasaki R, Matsumoto N, Ogawa M, Nirei K, and Moriyama M contributed to the supervision of this study; Moriyama M contributed to the project administration; all authors have read and agreed to the submitted version of the manuscript.
Conflict-of-interest statement: There is no conflict of interest.
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: Tatsuo Kanda, MD, PhD, Associate Professor, Division of Gastroenterology and Hepatology, Department of Medicine, Nihon University School of Medicine, 30-1 Oyaguchikami-cho, Itabashi-ku, Tokyo 173-8610, Japan. email@example.com
Received: May 28, 2020
Peer-review started: May 28, 2020
First decision: June 13, 2020
Revised: June 23, 2020
Accepted: July 16, 2020
Article in press: July 16, 2020
Published online: July 28, 2020