HLA-F and major depressive disorder: One eQTL in Ubiquitin Like Modifier Activating Enzyme 7 (UBA7; PPH4 = 0.9604) colocalized with PTSD associated variants, whereas two eQTLs were found to colocalize with MDD associated variants: one in HLA-F (PPH4 = 0.9844) and one in HSPA1B (PPH4 = 0.9509).