ABCB1 rs1128503 (C1236T) were significantly associated with grade 3-4 anemia in additive model (OR = 1.71; 95% CI: 1.07–2.71; p = 0.023) in 290 ovarian cancer patients (Lambrechts et al., 2015). The gene discussed is ABCB1; the disease is anemia (phenotype).