Nomograms for calculating the number of patients needed for a clinical trial with survival as an endpoint.

@article{Schoenfeld1982NomogramsFC,
  title={Nomograms for calculating the number of patients needed for a clinical trial with survival as an endpoint.},
  author={David A. Schoenfeld and J{\"o}rg Richter},
  journal={Biometrics},
  year={1982},
  volume={38 1},
  pages={
          163-70
        }
}
This paper presents nomograms for calculating the sample size for a clinical trial with survival as an endpoint. The nomograms are valid when survival is exponential and patients enter the study uniformly. 

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