@misc{indiciaeffa064e8ae89,
  title = {Some efficiency comments on group sizes in study design.},
  author = {J H Lubin},
  year = {1980},
  doi = {10.1093/oxfordjournals.aje.a112921},
  url = {https://pubmed.ncbi.nlm.nih.gov/7377188/},
  note = {Source identifier: 7377188}
}