@misc{indiciae405557849362,
  title = {Chronic obstructive lung disease.},
  author = {A I Kaplan},
  year = {1969},
  doi = {10.1056/nejm196905222802118},
  url = {https://pubmed.ncbi.nlm.nih.gov/5782132/},
  note = {Source identifier: 5782132}
}