title: The increasing problem of cephalosporin resistance mediated by extended-spectrum beta-lactamases.
authors.forename: Alan P
authors.initials: AP
authors.lastname: Johnson
mesh_terms: D018550:Cephalosporin Resistance / Q000502:physiology*; D001618:beta-Lactamases / Q000096:biosynthesis*
chemical_list: D001618:beta-Lactamases