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Sample size calculation utilizing the information fraction and the alpha spending function in a group sequential clinical trial with censored survival data from underlying generalized gamma survival distributions or loglogistic survival distributions. Hsu, C.H., Chen, C.H, Hsu, K.N. and Lu, Y.H. (2018) A useful design utilizing the information fraction in a group sequential clinical trial with censored survival data. To appear in Biometrics.
Package details 


Author  Hsu, ChihYuan and Chen, ChenHsin 
Maintainer  ChihYuan Hsu <cyhsu@stat.sinica.edu.tw> 
License  GPL2  GPL3 
Version  1.0.0 
Package repository  View on CRAN 
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