Mitsuru Sugimoto, Tadayuki Takagi, Rei Suzuki, Naoki Konno, Hiroyuki Asama, Yuki Sato, Hiroki Irie, Ko Watanabe, Jun Nakamura, Hitomi Kikuchi, Yuichi Waragai, Mika Takasumi, Minami Hashimoto, Hiromasa Ohira, Department of Gastroenterology, Fukushima Medical University, School of Medicine, Fukushima 960-1247, Japan
Ko Watanabe, Jun Nakamura, Hitomi Kikuchi, Minami Hashimoto, Takuto Hikichi, Department of Endoscopy, Fukushima Medical University Hospital, Fukushima 960-1247, Japan
Yuko Hashimoto, Department of Diagnostic Pathology, Fukushima Medical University, Fukushima 960-1247, Japan
Author contributions: Sugimoto M designed and performed the study; Sugimoto M, Takagi T and Ohira H analyzed the data and wrote the paper; Suzuki R, Konno N, Asama H, Sato Y, Irie H, Watanabe K, Nakamura J, Kikuchi H, Waragai Y, Takasumi M, Hashimoto M and Hikichi T provided clinical advice; Hashimoto Y performed pathological diagnoses; and Hikichi T and Ohira H supervised the study.
Institutional review board statement: This study was reviewed and approved by the Ethics Committee of Fukushima Medical University.
Informed consent statement: Patients were not required to give informed consent for participation in the study because the analysis used anonymous clinical data obtained after each patient provided written consent agreeing to treatment. For full disclosure, the details of the study are published on the home page of Fukushima Medical University.
Conflict-of-interest statement: We have no financial relationships to disclose.
Data sharing statement: No additional data are available.
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: Tadayuki Takagi, MD, PhD, Associate Professor, Department of Gastroenterology, Fukushima Medical University, 1 Hikarigaoka, Fukushima City, Fukushima Prefecture 960-1247, Japan. firstname.lastname@example.org
Telephone: +81-24-5471202 Fax: +81-24-5472055
Received: May 2, 2018
Peer-review started: May 4, 2018
First decision: May 17, 2018
Revised: June 5, 2018
Accepted: June 25, 2018
Article in press: June 25, 2018
Published online: July 21, 2018