CTLA4 and acute myeloid leukemia: For patients with AML, the C allele of rs733618 (CC vs. CT+TT, p = 0.0376, OR = 2.77, and 95% CI = 1.07–7.22) and the G allele of rs11571316 (GG vs. AA+AG, p = 0.0441, OR = 2.32, and 95% CI = 1.03–5.24) located in the promoter region of CTLA4 were associated with higher risk for mortality.