Phlegm production and lung function among cigarette smokers changing tar groups during the 1970s. [electronic resource]

By: Contributor(s): Producer: 19861006Description: 110-6 p. digitalISSN:
  • 0143-005X
Subject(s): Online resources: In: Journal of epidemiology and community health vol. 40
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Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't

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