@misc{indiciaeec5a60309a9c,
  title = {Letter: Isolation system for general hospitals.},
  author = {S Selwyn},
  year = {1974},
  doi = {10.1136/bmj.2.5920.667},
  url = {https://pubmed.ncbi.nlm.nih.gov/4835448/},
  note = {Source identifier: 4835448}
}