@misc{indiciaed6ae192eac3c,
  title = {Sample sizes for group sequential cohort and case-control study designs.},
  author = {B S Pasternack and R E Shore},
  year = {1981},
  doi = {10.1093/oxfordjournals.aje.a113082},
  url = {https://pubmed.ncbi.nlm.nih.gov/7468575/},
  note = {Source identifier: 7468575}
}