AUTHOR=Guo Jing , Li Shuiwen , Xu Hao , Wang Xinxin , Luo Weiyuan , Sun Jie , Li Jianhua , Chen Zhu , Lu Guiyang , Huang Xiaolong , Chen Shiju , Ning Yaogui TITLE=Plasma exchange alone versus combination with intravenous immunoglobulin/methylprednisolone pulse therapy in severe systemic rheumatic diseases: a retrospective study JOURNAL=Frontiers in Immunology VOLUME=15 YEAR=2024 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2024.1454691 DOI=10.3389/fimmu.2024.1454691 ISSN=1664-3224