Jun-Hyung Cho, Seong Ran Jeon, Digestive Disease Center, Soonchunhyang University Hospital, Seoul 04401, South Korea
So-Young Jin, Department of Pathology, Soonchunhyang University Hospital, Seoul 04401, South Korea
Suyeon Park, Department of Medical Biostatistics, Soonchunhyang University Hospital, Seoul 04401, South Korea
Author contributions: Cho JH was involved in the study design, performing the study, data collection and analyses, writing and revising the manuscript; Jeon SR and Jin SY were involved in the study design and revising the manuscript; Park S was involved in statistical analyses; all of the authors approved the final version of the manuscript.
Supported by the Soonchunhyang University Research Fund, No. 20200023.
Institutional review board statement: The study was reviewed and approved by the Institutional Review Board of Soonchunhyang University Hospital (No. SCHUH 2016-05-001).
Informed consent statement: All study participants, or their legal guardian, provided informed written consent prior to study enrollment.
Conflict-of-interest statement: The authors declare that they have no competing interest.
Data sharing statement: The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.
STROBE statement: The authors have read the STROBE Statement checklist of items, and the manuscript was prepared and revised according to the STROBE Statement-checklist of items.
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: Jun-Hyung Cho, MD, PhD, Associate Professor, Digestive Disease Center, Soonchunhyang University Hospital, No. 59 Daesagwan-ro, Yongsan-gu, Seoul 04401, South Korea. chojhmd@naver.com
Received: January 27, 2021
Peer-review started: January 27, 2021
First decision: March 29, 2021
Revised: March 31, 2021
Accepted: April 23, 2021
Article in press: April 23, 2021
Published online: May 14, 2021
