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Abbott RealTime and Cobas TaqMan degree of agreement (log10 copies/ml). The x axis of the Bland and Altman curves bears the mean values for each sample obtained by the two techniques. The y axis bears the differences between the values obtained by the two techniques. The solid line represents the mean difference between the values, and the dotted lines represent the mean difference plus or minus 1.96SD (95% limits of agreement).
