A comparison of the old and new antibiotics.
D000667:Ampicillin / Q000592:standards; D000900:Anti-Bacterial Agents / Q000592:standards* / Q000627:therapeutic use; D001424:Bacterial Infections / Q000188:drug therapy*; D002511:Cephalosporins / Q000592:standards; D006801:Humans; D010406:Penicillins / Q000592:standards
D000900:Anti-Bacterial Agents; D002511:Cephalosporins; D010406:Penicillins; D000667:Ampicillin