@misc{indiciaea1b451c85cee,
  title = {Chronic obstructive pulmonary disease.},
  author = {J Beech},
  year = {1991},
  doi = {10.1016/s0749-0739(17)30517-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/2054711/},
  note = {Source identifier: 2054711}
}