AUTHOR=Yan Huanhuan , Zi Xiaoyu , Yan Huer , Zhang Xiaoying , Bai Jie , Gao Chong , Li Xiaofeng , Wang Caihong 

TITLE=The absolute number of circulating Treg cells is reduced in difficult-to-treat RA patients and is ameliorated by low-dose IL-2

JOURNAL=Frontiers in Immunology

VOLUME=16

YEAR=2025

URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1522893

DOI=10.3389/fimmu.2025.1522893

ISSN=1664-3224