SLC6A5 and schizophrenia: We observed significant associations with schizophrenia in allele frequencies of SNP2 and SNP3 of SLC1A4 (P = 0.021, P = 0.029, respectively), and in genotype frequencies of SNP1 and SNP2 of SLC6A5 (P = 0.009, P = 0.022, respectively), although none of them survived after controlling the FDR at level 0.05 (n = 7 for SLC1A4 and n = 6 for SLC6A5).