Bacterial pneumonia in the elderly: the observations of Sir William Osler in retrospect.
D000367:Age Factors; D000368:Aged; D001424:Bacterial Infections / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D011014:Pneumonia / Q000266:history*; D014481:United States