Ahn, Chul, <br/><br/>
Sample size calculations for clustered and longitudinal outcomes in clinical research / 
Chul Ahl, Moonseong Heo, Song Zhang. 
 - xv, 244 pages :  illustrations ;  24 cm. 
 - Chapman & Hall/CRC biostatistics series .
 - Chapman & Hall/CRC biostatistics series. .
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>9781466556263  RM326.82 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sample Size.<br/>Statistics as Topic.<br/>Research design.<br/>Epidemiologic Studies.