@misc{indiciae870e1754bab5,
  title = {COPD: clinical phenotypes.},
  author = {Thomas L Petty},
  year = {2002},
  doi = {10.1006/pupt.2002.0380},
  url = {https://pubmed.ncbi.nlm.nih.gov/12220938/},
  note = {Source identifier: 12220938}
}