@misc{indiciaecea9e6e3feae,
  title = {Monitoring clinical trials: conditional or predictive power?},
  author = {D J Spiegelhalter and L S Freedman and P R Blackburn},
  year = {1986},
  doi = {10.1016/0197-2456(86)90003-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/3956212/},
  note = {Source identifier: 3956212}
}