@misc{indiciae6e61f161b990,
  title = {Chronic obstructive pulmonary disease.},
  author = {T L Petty},
  year = {1978},
  doi = {10.3810/pgm.2002.06.1222},
  url = {https://pubmed.ncbi.nlm.nih.gov/622016/},
  note = {Source identifier: 622016}
}