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Clone-forming and proliferation assays for SFCs and SSSCs. Typical morphology of (A) SFCs and (B) SSSCs expanded in vitro. Scale bars, 100 μm. Clone formation of (C) SFCs and (D) SSSCs after 14 days of culture. (E) Clone-forming rates of SFCs and SSSCs after culturing in vitro for 2 weeks. (F) Cell growth curves for SFCs and SSSCs. *P<0.05. SFCs, synovial fragment cells; SSSCs, surgery-obtained synovium specimen cells.
