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Agreement of viral-load values between the MWP 1.0 and MWP 1.5 (A), the MWP 1.0 and COBAS 1.5 (B), and the MWP 1.5 and COBAS 1.5 (C) tests. ○, ultrasensitive test; □, standard test. The solid lines represent the mean differences; the dashed lines represent ±2 standard deviations.
