HLA-DRB1 and acute graft versus host disease: Acute GVHD (grades 0-I) was positively associated with HLA-A10 (P = 0.0007; Pc = 0.0133), HLA-A26 (P = 0.002; Pc = 0.038), B55 (P = 0.001; Pc = 0.033), DRB1*15 (P = 0.0211; Pc = 0.2743) and DQB1*05 (P = 0.038; Pc = 0.19).