Nine SNPs (rs8025849 in NIPA1, rs3812922 in NIPA2, rs1009153 and rs2289818 in CYFIP1, rs8037745 in SNRPN, rs12438141 and rs1863467 in GABRB3, rs7403021 and rs7180500 in GABRG3) were nominally associated with autism under the recessive model (p < 0.05) (Table S4). Here, NIPA2 is linked to autism.