Risk of allogeneic transfusions.
D001787:Blood Group Incompatibility / Q000276:immunology; D006801:Humans; D007108:Immune Tolerance; D009369:Neoplasms / Q000601:surgery; D009894:Opportunistic Infections / Q000276:immunology; D011183:Postoperative Complications; D065227:Transfusion Reaction