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Mean values of results (expressed as log10 HCV RNA copies per milliliter of serum) determined by our RT-PCR protocol (ABI Prism 7700 assay), the bDNA assay and the NGI method are comparable. (A) Comparison of totals; differences in mean values are not significant (ns). The percentages of samples positive by each method are given in the box. (B) Comparison of mean values for groups of different genotypes; differences are not significant.
