@misc{indiciae8ae859217f45,
  title = {How many controls?},
  author = {M Gail and R Williams and D P Byar and C Brown},
  year = {1976},
  doi = {10.1016/0021-9681(76)90073-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/791962/},
  note = {Source identifier: 791962}
}