Blood bank's link to OR.
D000937:Antigen-Antibody Reactions; D001771:Blood Banks; D001773:Blood Cells; D001778:Blood Coagulation Disorders; D001792:Blood Platelets; D001793:Blood Preservation; D001803:Blood Transfusion; D006509:Hepatitis B / Q000635:transmission; D006650:Histocompatibility Testing; D006801:Humans; D007962:Leukocytes; D013514:Surgical Procedures, Operative