Donor mobilization and stem cell harvesting
For donor mobilization and stem cell harvesting, the donors received a 5–10 µg/kg infusion of granulocyte colony-stimulating factor (G-CSF) for 5 days before transplantation. Peripheral blood stem cells (PBSCs) were collected on days 4 and 5. Mobilization was considered successful when the CD34 cell count was 4–6 × 106/kg and the mononuclear cell (MNC) count was 6–8 × 108/kg.