@misc{indiciae4ba885e3ef09,
  title = {COPD guidelines.},
  author = {M Perry},
  year = {1998},
  doi = {10.1136/thx.53.7.624},
  url = {https://pubmed.ncbi.nlm.nih.gov/9797767/},
  note = {Source identifier: 9797767}
}