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Comparison of diagnostic values between serum M2-pyruvate kinase and carcinoembryonic antigen for positive colorectal lesions based on sensitivity and specificity in Hangzhou, 2006-2008. M2-PK: M2-pyruvate kinase; CEA: Carcinoembryonic antigen; CRC: Colorectal cancer; Adv.: Advanced; Nonad.: Nonadenomatous; Sens: Sensitivity; Spec: Specificity.
