@misc{indiciaeff6d5fbf4c0e,
  title = {A clinical trial with an interim analysis.},
  author = {P Y Chi and D R Bristol and J V Castellana},
  doi = {10.1002/sim.4780050411},
  url = {https://pubmed.ncbi.nlm.nih.gov/3764229/},
  note = {Source identifier: 3764229}
}