@misc{indiciae1e4dfaee3936,
  title = {Using group-sequential analysis to achieve the optimal sample size.},
  author = {Michael S Rogers and Allan M Z Chang and Susan Todd},
  year = {2005},
  doi = {10.1111/j.1471-0528.2005.00479.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/15842273/},
  note = {Source identifier: 15842273}
}