Manson, J E <br/><br/>
Baseline characteristics of participants in the Physicians' Health Study: a randomized trial of aspirin and beta-carotene in U.S. physicians.  [electronic resource] 

 -  American journal of preventive medicine   
 - 150-4 p.  digital 
<br/><br/> Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0749-3797 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Aged<br/>Aspirin--therapeutic use<br/>Carotenoids--therapeutic use<br/>Confounding Factors, Epidemiologic<br/>Double-Blind Method<br/>Humans<br/>Life Style<br/>Male<br/>Middle Aged<br/>Myocardial Infarction--prevention & control<br/>Neoplasms--prevention & control<br/>Reproducibility of Results<br/>beta Carotene