@misc{indiciaeecd60c59fbc6,
  title = {Chronic bronchitis and emphysema.},
  author = {W M Thurlbeck},
  year = {1973},
  doi = {10.1016/s0025-7125(16)32265-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4573463/},
  note = {Source identifier: 4573463}
}