@misc{indiciae48a87d0a2ae1,
  title = {Randomised controlled trials and retrospective controls.},
  author = {L Cranberg},
  year = {1980},
  doi = {10.1136/bmj.280.6217.866-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/7370710/},
  note = {Source identifier: 7370710}
}