Distribution of NK phenotypes. NK phenotypes that were examined are denoted as either NK Bright (CD56brightCD16-) or NK Dim (CD56dimCD16+). (A). The box plots represent the raw data of NK Bright cells in the two groups. CFS/ME patients were more decreased in the cell numbers for this particular NK phenotype. (B). However raw data of CD56dimCD16+NK cells were examined in the control and CFS/ME groups, these were found to be similar. (C). Using the raw data from the flow cytometry results, total counts of NK cells were deduced. These measurements are plotted using bar graphs, CD56brightCD16-NK cells are more reduced in the CFS/ME (black bars) group in comparison to the controls (white bars). *Denotes statistical significant results (P ≤ 0.05). Data presented as mean ± SEM.