@misc{indiciae66a9fa688f7b,
  title = {A simulated sequential analysis based on data from two MRC trials.},
  author = {A N Donaldson and J Whitehead and R Stephens and D Machin},
  year = {1993},
  doi = {10.1038/bjc.1993.499},
  url = {https://pubmed.ncbi.nlm.nih.gov/8260369/},
  note = {Source identifier: 8260369}
}