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Receiver operating characteristic curve. A: F0-F1 vs F2- F4 (F > 2) in all patients (n = 246); B: F0-F2 vs F3- F4 (F > 3) in all patients (n = 246); C: F0-F3 vs F4 (F = 4) in all patients (n = 246); D: F0-F1 vs F2- F4 (F > 2) in patients with chronic hepatitis C (n = 195); E: F0-F2 vs F3- F4 (F > 3) in patients with chronic hepatitis C (n = 195); F: F0-F3 vs F4 (F = 4) in patients with chronic hepatitis C (n = 195).
