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HIV RNA in CSF from HIV-infected donors. (A) Parallel testing of CSF samples from 12 HIV-infected donors with the Aptima (orange circles) and Abbott (blue circles) assays. The Aptima assay was performed in 2 replicates; means are denoted. Each donor is depicted with a distinct colored circle. P value calculated by Wilcoxon t test. (B) Correlation of Aptima and Abbott assays (Spearman r and P value). Dotted line denotes an ideal correlation (y = x).
