SLCO1B1 and myopathy: Both rs4149056 in SLCO1B1 and rs4149000 in SLCO1A2 were significantly associated with both definite myopathy (P = 7.30 × 10−14 and P = 7.62 × 10−11, respectively) and the incipient or definite myopathy phenotype (P = 1.33 × 10−11 and 6.49 × 10−12).