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Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) subscale scores over 24 weeks following intra-articular injection of amniotic membrane/umbilical cord particulate. WOMAC-A pain scores (expressed as mean ± SD in mm) (A), WOMAC-C physical function (B), WOMAC-B stiffness (C), and WOMAC global (D) are plotted against time. All data points were compared with baseline. *P < 0.05; **P ≤ 0.01; ***P ≤ 0.001.
