@misc{indiciaecc655c3c3e23,
  title = {Hand or machine? A second look at ventilators.},
  author = {R H Fletcher},
  year = {1971},
  doi = {10.1093/bja/43.8.821},
  url = {https://pubmed.ncbi.nlm.nih.gov/5284973/},
  note = {Source identifier: 5284973}
}