@misc{indiciae04047a9b0be7,
  title = {Chronic bronchitis and emphysema.},
  author = {D V Bates},
  year = {1968},
  doi = {10.1056/nejm196803072781007},
  url = {https://pubmed.ncbi.nlm.nih.gov/4866349/},
  note = {Source identifier: 4866349}
}