Stead, M <br/><br/>
Employing staff on long term contracts is important for RCTs.  [electronic resource] 

 -  BMJ (Clinical research ed.)  Apr 1999 
 - 1075 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>0959-8138 
<br/><br/><label>Standard No.: </label>10.1136/bmj.318.7190.1075a  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Personnel Selection<br/>Randomized Controlled Trials as Topic