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Receiver–operating curve (ROC) analysis of matrix metal‐loproteinase 7 in the detection of metastasis in bladder. ROC analysis included patients without metastases (N0M0) as a negative group, and metastatic urinary bladder cancer patients (N1M0 and M1) as a positive group. Black quadrates show the relative gene expression (A) and serum concentration (B) levels provide the highest specificity and sensitivity in the detection of bladder cancer metastasis.
