@misc{indiciae9398cd5d176b,
  title = {Controlled trials testing two or more treatments simultaneously.},
  author = {Richard Doll},
  year = {2005},
  doi = {10.1177/014107680509801020},
  url = {https://pubmed.ncbi.nlm.nih.gov/16199823/},
  note = {Source identifier: 16199823}
}