Studies thus far have focussed on BDNF in adults with borderline personality disorder,11SERT in children with anxiety disorders,12MAOA in adults with panic disorder13 and the HPA-axis-related genes FKBP5 and GR in children with anxiety disorders14 and in veterans with posttraumatic stress disorder.15 Interestingly, in the latter study, changes in FKBP5 methylation during exposure therapy were found to be associated with FKBP5 expression at follow-up. The gene discussed is FKBP5; the disease is post-traumatic stress disorder.