Chronic GVHD. (A) The 2-year cumulative incidence of chronic GVHD after transplantation of grafts from haploidentical sibling (42%; 95% CI, 35-50) and HLA-matched sibling (52%; 95% CI, 50-54); P < .001. (B) The 2-year cumulative incidence of chronic GVHD after transplantation of grafts from offspring (28%; 95% CI, 20-36) and HLA-matched sibling (46%; 95% CI, 44-49); P < .001.