Overall characteristics of the included studies.
Rheumatoid Arthritis
RHEUMATOID ARTHRITIS
UC-MSCs, Umbilical Cord-derived Mesenchymal Stem Cells; DMARDs, Rheumatoid Arthritis with Disease-Modifying Drugs; Ad-MSCs, Adipose-derived Mesenchymal Stem Cells; BM-MSCs, Bone marrow-derived Mesenchymal Stem Cells; IV, Intravenous infusion; IA, Intra-articular injection.