@misc{indiciae25d75f9c6edd,
  title = {Air pollution and COPD.},
  author = {J G Ayres and R M Harrison},
  year = {1995},
  doi = {10.1136/thx.50.8.917},
  url = {https://pubmed.ncbi.nlm.nih.gov/7570455/},
  note = {Source identifier: 7570455}
}