Klungel, Olaf H <br/><br/>
Methods to assess intended effects of drug treatment in observational studies are reviewed.  [electronic resource] 

 -  Journal of clinical epidemiology  Dec 2004 
 - 1223-31 p.  digital 
<br/><br/> Publication Type: Journal Article; Review 
<br/><br/><label>ISSN: </label>0895-4356 
<br/><br/><label>Standard No.: </label>10.1016/j.jclinepi.2004.03.011  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Confounding Factors, Epidemiologic<br/>Data Interpretation, Statistical<br/>Drug Therapy--statistics & numerical data<br/>Humans<br/>Models, Statistical<br/>Observation<br/>Qualitative Research<br/>Treatment Outcome