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Complementary elevations in primary tumors and plasma. A, Immunofluorescence staining showed expression of one, both, or neither of the markers. B, The quantification of tissue and plasma levels revealed low correspondence between the 2 markers. A substantial group of patients was elevated in only sTRA, based on thresholds set to the highest control samples (dashed lines), but the high correlation (0.74) was caused by one outlier value (arrowhead).
