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Moderate-severe chronic graft-versus-host disease–free survival by arm in each conditioning regimen. (A) Cyclophosphamide and total body irradiation (Cy-TBI). (B) Busulfan and cyclophosphamide (Bu-Cy). (C) Busulfan and fludarabine (Bu-Flu). Log-rank test was used for group comparisons. ATLG, anti–T-lymphocyte globulin.
