@misc{indiciae41093f711489,
  title = {Optimal sampling ratios for prospective studies.},
  author = {T Yanagawa and W J Blot},
  year = {1977},
  doi = {10.1093/oxfordjournals.aje.a112487},
  url = {https://pubmed.ncbi.nlm.nih.gov/920730/},
  note = {Source identifier: 920730}
}