Comparative outcome after PBSC versus BM transplantation in children. Panels A through D depict cumulative incidences of neutrophil engraftment (neutrophils > 500/μL), platelet engraftment (platelets > 20.000/μL), acute GVHD grade II-IV, and extensive chronic GVHD after PBSC versus BM transplantation. Panels E and F show overall survival and event-free survival after PBSC versus BM transplantation in a Kaplan-Meier plot.