Lan, K K <br/><br/>
Changing frequency of interim analysis in sequential monitoring.  [electronic resource] 

 -  Biometrics  Sep 1989 
 - 1017-20 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0006-341X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biometry<br/>Clinical Trials as Topic--methods<br/>Humans<br/>Models, Statistical<br/>Probability