@misc{indiciaeeb6a6ba8726f,
  title = {Chronic bronchitis and emphysema.},
  author = {D V Bates},
  year = {1968},
  doi = {10.1056/nejm196803142781106},
  url = {https://pubmed.ncbi.nlm.nih.gov/4866540/},
  note = {Source identifier: 4866540}
}