FKBP5 and post-traumatic stress disorder: van Zuiden et al. evaluated the predictive role of mRNA expression of GR–α, GR-P, GR-β, glucocorticoid- induced leucine zipper (GILZ), glucocorticoid-inducible kinase-1 (SGK-1), or FKBP5 in peripheral blood mononuclear cells (PBMCs) and the number of GRs in PBMCs on post-deployment PTSD status.