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Intraassay variability in plasma HIV-1 RNA levels for five replicates of three samples. The Roche Amplicor Monitor assay was used to quantitate plasma HIV-1 RNA levels (copies per milliliter) by two different experienced technicians in separate sample runs. The mean number of RNA copies per milliliter and the standard deviation (SD) (log10) for each sample run, by technician, are located within the columns and above the columns, respectively.
