Group Sequential Methods for Clinical Trials Allowing Early Acceptance of H o and Incorporating Costs

Biometrika ◽  
1982 ◽  
Vol 69 (1) ◽  
pp. 75 ◽  
Author(s):  
A. Lawrence Gould ◽  
Victor J. Pecore
2000 ◽  
Vol 9 (5) ◽  
pp. 497-515 ◽  
Author(s):  
B. Spiessens ◽  
E. Lesaffre ◽  
G. Verbeke ◽  
K. Kim ◽  
D.L. DeMets

2000 ◽  
Vol 9 (5) ◽  
pp. 497-515 ◽  
Author(s):  
Bart Spiessens ◽  
Emmanuel Lesaffre ◽  
Geert Verbeke ◽  
KyungMann Kim ◽  
David L DeMets

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