@misc{indiciae460234b60b32,
  title = {Interim analyses in randomized clinical trials: ramifications and guidelines for practitioners.},
  author = {N L Geller and S J Pocock},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/3567306/},
  note = {Source identifier: 3567306}
}