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Reproducibility of the FACSPresto™ system was assessed for (A) absolute CD4 counts and (B) CD4% of lymphocytes. Two sets of ten samples were analysed for Beckman Coulter Immunotrol (IT) normal and low (Repro 1 and 2 IT) and for nine patient samples (PS) with low, medium and high CD4 counts (3 per group), indicated as Repro PS Set 1–3. %CV results are indicated for each data set.
