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The receiver operating characteristic (ROC) curve of the serum interferon-γ-inducible protein 10 (IP-10) concentrations in patients with genotype 1 infection and severe fibrosis (stages 3, 4). The area under the curve (AUC) was 0.846 (95% confidence interval, 0.740 to 0.952), and the cutoff value of the serum IP-10 concentration was 100.3 pg/mL (sensitivity, 82.6%; specificity, 72.7%).
