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. 2020 Oct 7;26(37):5661–5672. doi: 10.3748/wjg.v26.i37.5661

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©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.

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.

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Subgroup analysis of the comparative risk of ulcerative colitis and Crohn’s disease in patients with periodontitis compared with those without periodontitis. Error bars represent 95% confidence intervals. A: Ulcerative colitis; B: Crohn’s disease. HR: Hazard ratio; CI: Confidence interval.