Hennekens, C H <br/><br/>
Contributions of observational evidence to prevention research.  [electronic resource] 

 -  Preventive medicine  Sep 1994 
 - 584-6 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0091-7435 
<br/><br/><label>Standard No.: </label>10.1006/pmed.1994.1092  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiologic Methods<br/>Humans<br/>Preventive Medicine<br/>Research<br/>Risk<br/>Risk Factors