title: An antibiotic update: I. New penicillins and cephalosporins.
mesh_terms: D002511:Cephalosporins / Q000008:administration & dosage / Q000145:classification; D006801:Humans; D010406:Penicillins / Q000008:administration & dosage / Q000145:classification
chemical_list: D002511:Cephalosporins; D010406:Penicillins