NEUROG2 and post-traumatic stress disorder: Well-matched to the PBMCs described above, 21-day-old NGN2-neurons from combat-exposed veterans with (n = 19) and without (n = 20) PTSD (Supplementary Table 1) were treated with two to three distinct concentrations of HCort (100 nM, 1,000 nM or 2,500 nM) and an untreated baseline condition for 24 h before RNA-seq (Fig. 2a).