ABCB1 and skin disorder: Additionally, the ABCB1 rs2032582 G > T/A polymorphism (A/T and G/T genotypes) was associated with any grade ≥ 2 skin disorders and grade ≥ 2 lymphocyte count decrease (Online Resource, Table F2, p = 0.017; Table F3, p = 0.033; respectively, in an additive model).