17 SNPs linkage disequilibrium (LD) analysis of CYP2C9 in Li population. Abbreviations: LD: Linkage disequilibrium; LOD: likelihood of odds; LD is indicated by bright red (very strong: LOD ≥ 2, D’ = 1), light red (LOD ≥ 2, D’ < 1) and blue (LOD < 2, D’ = 1) for intermediate LD, and white (none: LOD < 2, D’ < 1).