GRM7 and schizophrenia: Rs2133450 is in the glutamate metabotropic receptor GRM7 (Stevenson et al., 2016) and rs1875705 in the NMDA receptor subunit GRID2 (Stahl, 2018), likely modulating glutamatergic neurotransmission, whose dysfunction contributes to schizophrenia (Schwartz et al., 2012; Smith et al., 2020).