@misc{indiciae1b4faea44067,
  title = {Artifact emphysema.},
  author = {S F Ryan},
  year = {1969},
  doi = {10.1164/arrd.1969.99.5.801},
  url = {https://pubmed.ncbi.nlm.nih.gov/4890671/},
  note = {Source identifier: 4890671}
}