title: Single dose cephazolin prophylaxis in biliary tract surgery.
mesh_terms: D000368:Aged; D001646:Bile / Q000032:analysis; D001662:Biliary Tract Surgical Procedures; D002437:Cefazolin / Q000032:analysis / Q000097:blood / Q000627:therapeutic use*; D002511:Cephalosporins / Q000627:therapeutic use*; D006801:Humans; D008875:Middle Aged; D013530:Surgical Wound Infection / Q000517:prevention & control*
chemical_list: D002511:Cephalosporins; D002437:Cefazolin