Rapid response to avapritinib of acute myeloid leukemia with t(8;21) and KIT mutation relapse post allo-HSCT. Issue 9 (29th July 2022) - Xue, Song; Huang, Wenqiu; Liu, Fuhong; Zhang, Yongping; Hao, Qi; Cui, Bin; Chen, Suning; Wang, Jingbo