Objective: To observe the effect of autologous peripheral blood stem cells transplantation ( APBSCT) on neutropenia and thrombocytopenia when tandem transfusion of stem cells is given. 目的:观察两次干细胞输注在自体外周血干细胞移植(APBSCT)中对中性粒细胞及血小板减少的影响,观察其对患者并发感染和出血的影响。