Perkins, S M <br/><br/>
The use of propensity scores in pharmacoepidemiologic research.  [electronic resource] 

 -  Pharmacoepidemiology and drug safety  Mar 2000 
 - 93-101 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1099-1557 
<br/><br/><label>Standard No.: </label>10.1002/(SICI)1099-1557(200003/04)9:2<93::AID-PDS474>3.0.CO;2-I  doi