Out of the 21 SNPs analyzed, two within SLC1A4, (SNP4 and SNP6, 330 cases and 319 controls) and one within SLC6A5, (SNP5, 328 cases and 307 controls) have recently been reported to show no association with schizophrenia in the German population [38,41]. This evidence concerns the gene SLC6A5 and schizophrenia.