Combination of venetoclax and azacitidine in relapsed/refractory acute B-cell lymphoblastic leukemia: a case series from a single center - Ziyi Hao; Yingying Fei; Juan Chen; Sailan Huang; Li Wang; Youhuan Yu; Meiru Bian; Yejun Si; Xingxia Zhang; Xiaotian Yang; Bing Zhang; Yan Wan; et al. (Hematology, 2024)