title: Trends in pathogens among patients hospitalized for pneumonia from 1993 to 2011.
authors.affiliation: Department of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois.
authors.forename: Sean B
authors.initials: SB
authors.lastname: Smith
authors.affiliation: Section of Hospital Medicine, Department of Medicine, University of Chicago, Chicago, Illinois.
authors.forename: Gregory W
authors.initials: GW
authors.lastname: Ruhnke
authors.affiliation: Department of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois.
authors.forename: Curtis H
authors.initials: CH
authors.lastname: Weiss
authors.affiliation: School of Medicine and Pharmacology, Royal Perth Hospital Unit, University of Western Australia, Perth, Australia.
authors.forename: Grant W
authors.initials: GW
authors.lastname: Waterer
authors.affiliation: Department of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois.
authors.forename: Richard G
authors.initials: RG
authors.lastname: Wunderink
mesh_terms: D000328:Adult; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D018410:Pneumonia, Bacterial / Q000453:epidemiology / Q000382:microbiology*; D012189:Retrospective Studies; D014481:United States / Q000453:epidemiology