TNFRSF14 and post-traumatic stress disorder: Results of our PET study converged with postmortem brain analyses showing lower relative gene expression—statistically significant only in females with PTSD—of prefrontal cortical TSPO; TNFRSF14, which encodes TNF-α receptors expressed on microglia; and TSPOAP1, encoding TSPO-associated protein 1, also known as peripheral benzodiazepine receptor-associated protein 1 (PRAX1).