FLT3 and acute promyelocytic leukemia: Moreover, in Multivariate Cox Proportional Regression, the risk factors of venous thrombosis in APL were WT-1 (P = 0.043, OR 9.14, 95% CI 1.072-77.825) and FLT3/ITD (P = 0.013, OR 21.89, 95% CI 1.938-247.176), respectively (Table 4).