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Standardization of quantitative HIV-1 tests to a global primary standard is required by regulatory authorities to ensure comparability of test results across different assays and platforms of different manufacturers.Three generations of quantitative HIV-1 tests, the COBAS ® AMPLICOR ® HIV-1 Monitor Test, v1.5 (HIV-1 Monitor test v1.5); the COBAS ® AmpliPrep/COBAS ® ...