@misc{indiciae0b77212c3f27,
  title = {Supplemental oxygen in COPD.},
  author = {T Ringbaek},
  year = {2001},
  doi = {10.1136/thorax.56.1.84e},
  url = {https://pubmed.ncbi.nlm.nih.gov/11193488/},
  note = {Source identifier: 11193488}
}