All of those genes exhibited strong associations with schizophrenia susceptibility (DLG1, rs436564, P = 8.97 × 10−4; DLG2, rs12294291, P = 4.90 × 10−7; DLG4, rs222854, P = 3.76 × 10−5; ERBB4, rs16846200, P = 1.62 × 10−5; GRIN2A, rs9922678, P = 6.72 × 10−9; GRIN2B, rs11757887, P = 8.81 × 10−7; Supplementary Figure S4) with GRIN2A, reaching genome-wide significance in the PGC2 study. Here, GRIN2A is linked to schizophrenia.