MAOB and schizophrenia: The minor (alternative) allele frequency for MAO-B rs1799836 polymorphism (G allele) in patients with schizophrenia was 0.483, and for MAO-B rs6651806 (C allele) 0.300, similar to the European population were MAF (G allele) = 0.455 and MAF (C allele) = 0.291 for rs1799836 and rs6651806 SNP, respectively) (ALFA project) (Supplementary Table S1).