Risk of inflammatory bowel disease in patients with chronic obstructive pulmonary disease: A nationwide, population-based study
Jooyoung Lee, Joo Sung Kim, Department of Internal Medicine and Healthcare Research Institute, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul 06236, South Korea
Jooyoung Lee, Jong Pil Im, Seona Park, Hosim Soh, Kukhwan Choi, Joo Sung Kim, Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul 03080, South Korea
Kyungdo Han, Department of Biostatics, College of Medicine, Catholic University of Korea, Seoul 06591, South Korea
Jihye Kim, Department of Internal Medicine, CHA Gangnam Medical Center, CHA University, Seoul 06135, South Korea
Jaeyoung Chun, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, South Korea
Author contributions: Lee J, Han KD and Im JP design the research; Han KD, Park S, Soh H, and Choi K contributed in data acquisition; Lee J and Han KD contributed in data analysis and interpretation; Lee J and Im JP drafted the manuscript; Kim J, Chun J and Kim JS critically revised the manuscript; All authors approved the final manuscript.
Institutional review board statement: The study protocol was approved by the Seoul National University Hospital Institutional Review Board (H-1703-107-840).
Informed consent statement: All personal information was encrypted and all data were anonymous. And informed consent was waived by the Seoul National University Hospital Institutional Review Board because of retrospective study design.
Conflict-of-interest statement: All authors declare no conflicts-of-interest related to this article.
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/
Corresponding author: Jong Pil Im, MD, PhD, Professor, Doctor, Department of Internal Medicine and Liver Research Instititute, Seoul National University College of Medicine, 101 Daehak-ro, Chongno-gu, Seoul 03080, South Korea. email@example.com
Received: July 2, 2019
Peer-review started: July 2, 2019
First decision: August 2, 2019
Revised: September 18, 2019
Accepted: October 17, 2019
Article in press: October 17, 2019
Published online: November 14, 2019