@misc{indiciaedb295f5c41e3,
  title = {Sample size determination for group sequential clinical trials with immediate response.},
  author = {K Kim and D L Demets},
  year = {1992},
  doi = {10.1002/sim.4780111012},
  url = {https://pubmed.ncbi.nlm.nih.gov/1518999/},
  note = {Source identifier: 1518999}
}