FKBP5 and Anxiety: While these findings contradict data retrieved from the rodent models in studies by St-Cyr et al. (2017) and Hartmann et al. (2015) where decreased methylation and subsequent increase in FKBP5 expression underscored the anxiety phenotype, these studies suggest that FKBP5 methylation levels in the blood and saliva can be used to determine populations that may benefit from aggressive CBT regimens.