@misc{indiciae1698ccb957c9,
  title = {Practical problems in interim analyses, with particular regard to estimation.},
  author = {S J Pocock and M D Hughes},
  year = {1989},
  doi = {10.1016/0197-2456(89)90059-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/2605969/},
  note = {Source identifier: 2605969}
}