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Table 1 Amplification of the gp120 V3 sequence from the 200 whole blood samples stored at +4°C (WB4) and at −20°C (WB20) using a first singlicate plus second triplicate testing approach

From: Stability of unfrozen whole blood DNA for remote genotypic analysis of HIV-1 coreceptor tropism

Sample type Positive with first singlicate test Positive with second triplicate test Negative with both first singlicate and second triplicate test Overall % of positive cases
WB4 155 26 19 90.5
WB20 152 27 21 89.5