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Fig. 4 | AIDS Research and Therapy

Fig. 4

From: Duplicate analysis method: a cheaper alternative to commercial IQC materials in limited resource settings for monitoring CD4 testing

Fig. 4

Comparison of % CV, mean percent variation differences and r2 values. % CV (calculated for commercial controls) indicated as closed bars and mean percent variation (for duplicate analysis method) indicated as open bars are plotted on left Y axis for laboratories 1, 2, 3, 5, 6, 7 (plotted on X axis). r2 values calculated by regression analysis for duplicate analysis method are indicated as line diagram and are plotted on Z axis. Error bars for each parameter indicate standard error.

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