Haploidentical donor transplant is associated with secondary poor graft function after allogeneic stem cell transplantation: A single‐center retrospective study oleh Wei‐Ran Lv, Ya Zhou, Jun Xu, Zhi‐Ping Fan, Fen Huang, Na Xu, Li Xuan, Peng‐Cheng Shi, Hui Liu, Zhi‐Xiang Wang, Jing Sun, Qi‐Fa Liu