%0 Journal Article %T Plasma interleukin-21 levels and genetic variants are associated with susceptibility to rheumatoid arthritis %A Hao, Youguo %A Xie, Lijun %A Xia, Jing %A Liu, Zhen %A Yang, Baoxiu %A Zhang, Minqin %J BMC Musculoskeletal Disorders %V 22 %N 1 %D 2021-03-05 %I BioMed Central %~ DeepDyve