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Therapeutic effect of umbilical cord blood mesenchymal stem cells on advanced OA inflammation. A: Changes of serum IL-1 in each group. B: Changes of serum IL-2 in each group. C: Changes of serum IL-6 in each group. D: Changes of serum IL-10 in each group. E: Changes of serum MCP-1 in each group. F: Changes of serum TNF-a in each group. * indicates P<0.05, ** indicates P<0.01, *** indicates P<0.001.
