CLEC9A and post-traumatic stress disorder: First, using a DNAm bead chip that interrogated ~ 27K loci in a sample of 100 subjects from an urban community cohort, Smith et al. (2011) reported false discovery rate (FDR)-corrected differences between PTSD cases and controls at loci in 5 genes (ACP5, ANXA2, CLEC9A, TLR8, and TPR) [4].