The use of blood.
D000017:ABO Blood-Group System; D000776:Anesthesiology; D001771:Blood Banks; D001782:Blood Donors; D001787:Blood Group Incompatibility; D001803:Blood Transfusion; D006509:Hepatitis B / Q000209:etiology; D006511:Hepatitis B Antigens; D006801:Humans; D007258:Informed Consent; D033221:Jehovah's Witnesses; D033222:Judicial Role; D008318:Malpractice; D010817:Physician-Patient Relations; D012067:Religion; D012204:Rh-Hr Blood-Group System; D018570:Risk Assessment; D014481:United States
D000017:ABO Blood-Group System; D006511:Hepatitis B Antigens; D012204:Rh-Hr Blood-Group System