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MMP2 protein expression measured using ELISA and glioma prognosis. A. MMP2 protein level in different grade glioma patient’s blood serum; Middle lines mark median. Asterisks indicate significance levels: *P < 0.05, **P < 0.01. B. Kaplan-Meier survival curves, indicating survival (months) dependency on MMP2 protein expression level; Log-rank test χ 2 = 2.261, df = 1; P = 0.133.
