Many of the GABRG1 SNPs were in allelic identity (Table 1). Twelve SNPs were selected to capture all the allelic variation across GABRG1 and the intergenic regions. The two GABRA2 SNPs that tag the GABRA2 risk haplotypes were included. PHASE was employed to determine long-distance haplotypes across the two gene regions using the 14 SNPs indicated in Table 1.
