Representative gels. (A) VKORC1 rs9923231 polymorphism. Lane M, a 100-bp ladder; lanes 1 and 2, an AA homozygote with fragments of 119-bp and 284-bp; lanes 3 and 4, a GA heterozygote with fragments of 119-bp, 208-bp and 284-bp; and lanes 5 and 6, a GG with fragments of 208-bp and 284-bp. (B) CYP2C9 rs1570910 polymorphism. Lane M, a 100-bp ladder; lanes 1 and 2, a *1*1 homozygote with fragments of 125-bp and 287-bp; lanes 3 and 4, a *1*3 heterozygote with fragments of 125-bp, 200-bp and 287-bp; and lanes 5 and 6, a *3*3 with fragments of 200-bp and 287-bp. CYP = Cytochrome P450, VKORC1 = Vitamin K epoxide reductase complex, subunit 1.