@misc{indiciaee729a4bb39b9,
  title = {Twenty years on.},
  author = {B W McGuinness},
  year = {1976},
  doi = {10.1136/bmj.2.6034.518},
  url = {https://pubmed.ncbi.nlm.nih.gov/953656/},
  note = {Source identifier: 953656}
}