EMX2 and schizophrenia: In the schizophrenia suicide group, the EMX2 and PLSCR4 expression levels were significantly down-regulated by comparison of mean expression levels (EMX2 t(9) = 2.42, p = 0.02; PLSCR4 t(18) = 3.77, p = 0.0005) in the suicide group compared to the non-suicide group (Fig 1B).