title: Penicillin--before and after.
mesh_terms: D004739:England; D049673:History, 20th Century; D007239:Infections / Q000188:drug therapy; D010403:Penicillin Resistance; D010406:Penicillins / Q000008:administration & dosage / Q000266:history*; D014481:United States
chemical_list: D010406:Penicillins