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Hepatitis C virus (HCV)-infected patients were tested for the presence of HCV RNA using two qualitative assays at various time points during interferon-ribavirin therapy. Among patients treated for 48 weeks, transcription-mediated amplification and the COBAS AMPLICOR Hepatitis C Virus Test results at Week 24 predicted subsequent virologic non-response or virologic relapse in 12/15 (80%) and 8/15 (53%)...
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