Lang, J M <br/><br/>
No free lunch.  [electronic resource] 

 -  Journal of clinical epidemiology  May 1992 
 - 563-5 p.  digital 
<br/><br/> Publication Type: Comment; Letter 
<br/><br/><label>ISSN: </label>0895-4356 
<br/><br/><label>Standard No.: </label>10.1016/0895-4356(92)90107-x  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clinical Trials as Topic--standards<br/>Follow-Up Studies<br/>Humans<br/>Randomized Controlled Trials as Topic--standards<br/>Time Factors