In PTSD, alterations in DNA methylation have so far been documented within the exon 1B, 1C, and 1F NR3C1 promoter regions (Labonte et al. 2014; Vukojevic et al. 2014; Yehuda et al. 2015; Schechter et al. 2015). Here, NR3C1 is linked to post-traumatic stress disorder.