Is residual confounding a reasonable explanation for the apparent protective effects of beta-carotene found in epidemiologic studies of lung cancer in smokers? [electronic resource]

By: Contributor(s): Producer: 20020417Description: 622-8 p. digitalISSN:
  • 0002-9262
Subject(s): Online resources: In: American journal of epidemiology vol. 155
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Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S.

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