Mid-Course Sample Size Modification in Clinical Trials Based on the Observed Treatment Effect. Jennison, C. & Turnbull, B. W. Stat Med, 22:971-993, 2003.
bibtex   
@article{jen03mid,
  title = {Mid-Course Sample Size Modification in Clinical Trials Based on the Observed Treatment Effect},
  volume = {22},
  journal = {Stat Med},
  author = {Jennison, C. and Turnbull, B. W.},
  year = {2003},
  pages = {971-993},
  citeulike-article-id = {13265511},
  posted-at = {2014-07-14 14:09:58},
  priority = {0}
}

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