@misc{indiciae29a5af69e3be,
  title = {Long-term oxygen therapy.},
  author = {N R Anthonisen},
  year = {1983},
  doi = {10.7326/0003-4819-99-4-519},
  url = {https://pubmed.ncbi.nlm.nih.gov/6354031/},
  note = {Source identifier: 6354031}
}