@misc{indiciae8ee3f20eaab6,
  title = {Helium/oxygen and severe COPD.},
  author = {G Laden},
  year = {2001},
  doi = {10.1016/s0140-6736(05)71710-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/11229699/},
  note = {Source identifier: 11229699}
}