title: Air pollution and pneumonia: the "old man" has a new "friend".
authors.forename: Antonella
authors.initials: A
authors.lastname: Zanobetti
authors.forename: Mark
authors.initials: M
authors.lastname: Woodhead
mesh_terms: D000368:Aged; D000393:Air Pollutants / Q000009:adverse effects*; D017714:Community-Acquired Infections / Q000209:etiology; D004636:Emergency Service, Hospital / Q000706:statistics & numerical data; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D015994:Incidence; D009864:Ontario / Q000453:epidemiology; D011014:Pneumonia / Q000453:epidemiology / Q000209:etiology*; D012307:Risk Factors
chemical_list: D000393:Air Pollutants