Donor chimerism kinetics by conditioning regimen, and comparison of serum IgE. (A) Latest donor chimerism by cell line for surviving patients stratified by conditioning regimen backbone. (B) Comparison of pre-HSCT and post-HSCT serum IgE (kU/L) by Wilcoxon matched-pairs signed rank test. (C) Latest donor chimerism by cell line for surviving patients. Horizontal line represents median. (D) Proportion of patients with full (>90%) vs mixed chimerism by conditioning regimen backbone. (E) Proportion of patients with full (>90%) vs mixed chimerism by age at HSCT. Bu, busulfan; Mel, melphalan; Treo, treosulfan.