Detsky, A S <br/><br/>
When was a "negative" clinical trial big enough? How many patients you needed depends on what you found.  [electronic resource] 

 -  Archives of internal medicine  Apr 1985 
 - 709-12 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0003-9926 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clinical Trials as Topic--methods<br/>Humans<br/>Prospective Studies<br/>Random Allocation<br/>Research Design--standards<br/>Retrospective Studies<br/>Statistics as Topic