CXCL8 and major depressive disorder: In BoDV-1 positive MDD patients, the majority of IL-8 concentrations were observed to vary – comparable to IL-8 concentrations in the comparison group – between 4.99 and 10.00 pg/ml, but mean relative fronto-central EEG alpha power showed a high variability of data with relative power values of up to 7% (see Figure 3 and Table 1).