Porta Serra, M <br/><br/>
[Clinical investigation methods: errors, fallacies and challenges].  [electronic resource] 

 -  Medicina clinica  Jan 1990 
 - 107-15 p.  digital 
<br/><br/> Publication Type: Journal Article; Review 
<br/><br/><label>ISSN: </label>0025-7753 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bias<br/>Humans<br/>Random Allocation<br/>Research Design