VEGFA and acute myeloid leukemia: Subgroup analyses showed that sample size ≥ 40 (SMD = 0.95, 95% CI = 0.14 to 1.77), plasma (SMD = 0.80, 95% CI = 0.16 to 1.44), Asia and Africa (SMD = 1.09, 95% CI = 0.39 to 1.80), and age ≥ 45 (SMD = 2.05, 95% CI = 0.06 to 4.04) had higher level of VEGF in AML (Table 2).