摘要
<正>Severe aplastic anemia(SAA) is a lethal disease that has been shown to be cured by allogeneic hematopoietic stem cell transplantation(HSCT) dating back to the transplant’s early days [1].It is also the prototype of transplantation in its original means, as in HSCT for SAA the malfunctioning organ—the hematopoietic system in the bone marrow is replaced by a functional organ similarly to any other organ transplantation process. However,