^a)Data presented as mean (±standard deviation). ^b)The number represents the number of patients requiring platelet transfusion or G-CSF support, respectively.

Abbreviations: BUMEL, busulfan plus melphalan; G-CSF, granulocyte colony stimulating factor; HDMEL, high-dose melphalan; OS, overall survival; PFS, progression-free survival; tf, transfusion; TRM, transplantation-related mortality.