The final call rate for the 4 genotyped SNPs, rs17354547, rs1402812, rs4956396 and rs4956302 was 99.35%, 99.30%, 99.50% and 99.30%, respectively. To verify the quality of our genotyping, we also checked the SNP data for any significant departure from Hardy-Weinberg equilibrium (HWE). The HWE at each locus was assessed by the χ2 test and the significance level for the test was set at 0.0125 (=0.05/4), adjusting for multiple testing of four SNPs. All the genotyped SNPs were in HWE (p > 0.0125). In particular, for the SNP, rs17354547, the p value was 0.258.
