SLCO1B3 and neutropenia: Table 1 lists the 10 most strongly associated SNPs from the meta-analysis. One SNP on chromosome 12 surpassed the GWS threshold for association with clozapine-associated neutropenia (OR=4.32, P=1.79 × 10−8). rs149104283 is intronic to transcripts of SLCO1B3 and SLCO1B7 (solute carrier organic anion transporter family, member 1B3 and member 1B7) and was present in 7.37% of cases versus 1.52% of controls in our sample and 4.20% of cases versus 1.67% of controls in the CIAC sample. For consideration of how this may be translated to risk allele carrier status see Supplementary Results.