SYN2 and schizophrenia: Out of the 21 possible pairs of SNPs, significant haplotype associations with schizophrenia were observed for 4 pairs: SYN2-1 – SYN2-2 (χ2 = 27.58, df = 3, P = 4.45 × 10-6), SYN2-2 – SYN2-4 (χ2 = 16.46, df = 3, P = 9.12 × 10-4), SYN2-2 – SYN2-7 (χ2 = 8.08, df = 3, P = 0.044), and SYN2-3 – SYN2-4 (χ2 = 10.66, df = 3, P = 0.014) (Table 3).