Additional cytogenetic abnormalities in patients with newly diagnosed acute promyelocytic leukemia predict inferior event‐free survival oleh Hui Zeng, Hai‐Bo Dong, Qi‐Guo Zhang, Min Zhou, Qian Zhang, Lan‐Xin Chen, Cui‐Ying Yuan, Ru‐Ru Jiang, Jin‐Wen Liu, Jian Ou‐Yang, Jie He, Bing Chen