There was significant FKBP5 diplotypes main effect on spectral power in the anterior cingulate cortex (ACC) in slow-4 band, and in the bilateral precentral/postcentral gyri and middle cingulate cortex (MCC) in slow-3 band in all participants, irrespective of PTSD diagnosis (Fig. 3 and Supplementary Table 4). This evidence concerns the gene FKBP5 and post-traumatic stress disorder.