Pneumonia in the United States. Shifting perceptions of causality.
Wilson
M E
ME
Mount Auburn Hospital, Cambridge, Massachusetts 02238.
D004196:Disease Outbreaks; D006801:Humans; D011014:Pneumonia / Q000453:epidemiology / Q000382:microbiology* / Q000821:virology; D014481:United States / Q000453:epidemiology