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NK Cell cytotoxicity. Left: Raw cytotoxicity values at baseline and six months. Right: Fold changes between baseline and six months. Cytotoxicity was quantified as either the amount of Cr51 released into the supernatant by dying Cr51-labelled K562 cells or the amount of CP450-labelled K562 cells that stain positive for propidium iodide. Error bars represent mean and 95% confidence interval. NS = not statistically significant; * = statistically significant.
