We also identified PTSD-associated CpGs in genes GFI1, CHD5, TOLLIP, ADCY4, and BANP. While the precise mechanisms linking these genes to PTSD are not entirely understood, evidence suggests that they are responsive to stress and have been implicated in stress-related disorders, immune response, and other psychiatric disorders [107–111]. This evidence concerns the gene CHD5 and post-traumatic stress disorder.