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. 2018 Feb 21;6(4):500–508. doi: 10.1177/2050640618761703

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Figure 2. — (a) Forest plot of the meta-analysis evaluating the risk of all primary sclerosing cholangitis among current smokers compared with nonsmokers. (b) Forest plot of the meta-analysis evaluating the risk of primary sclerosing cholangitis without inflammatory bowel disease among current smokers compared with nonsmokers. (c) Forest plot of the meta-analysis evaluating the risk of primary sclerosing cholangitis with inflammatory bowel disease among current smokers compared with nonsmokers. CI: confidence interval; df: degree of freedom; IV: inverse variance; PSC: primary sclerosing cholangitis; SE: standard error.