Stram, Daniel O <br/><br/>
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] 

 -  American journal of epidemiology  Apr 2002 
 - 622-8 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0002-9262 
<br/><br/><label>Standard No.: </label>10.1093/aje/155.7.622  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Antioxidants--adverse effects<br/>Confounding Factors, Epidemiologic<br/>Epidemiologic Studies<br/>Humans<br/>Lung Neoplasms--epidemiology<br/>Models, Statistical<br/>Smoking--adverse effects<br/>beta Carotene--adverse effects