AUTHOR=Yao Ruoyu , Xu Guofen , Fu Xiujuan , Zhang Wenrui , Wang Han , Chen Yu , Yao Jia TITLE=Clinical characteristics and the role of IL-6 in acute-on-chronic liver failure patients with or without COVID-19: a multicenter paired cohort study JOURNAL=Frontiers in Cellular and Infection Microbiology VOLUME=14 YEAR=2025 URL=https://www.frontiersin.org/journals/cellular-and-infection-microbiology/articles/10.3389/fcimb.2024.1471974 DOI=10.3389/fcimb.2024.1471974 ISSN=2235-2988