Cumulative incidences of grades 2 to 4 and 3 to 4 aGVHD stratified according to the donor types. (A) Grades 2 to 4 aGVHD. (B) Grades 3 to 4 aGVHD. (C) Grades 2 to 4 aGVHD controlling for patients received stem cells from a fully 10/10 HLA -matched URD. (D) Grades 3 to 4 aGVHD controlling for patients received stem cells from a fully 10/10 HLA -matched URD. (Analyzed by the competing risk method.)