IL21 and primary biliary cholangitis: Qiu34et al.’s research supporting the hypothesis that IL21 signaling pathway and Tfh cells participate in the pathogenesis of PBC was a relatively large GWAS of PBC in the Han Chinese, but this study did not include the association between ETS-1 polymorphism and PBC susceptibility, so our study may be the first report that ETS-1 is a susceptibility site for PBC in the Han population.