@misc{indiciae8da1e81a09a2,
  title = {Chronic oxygen therapy.},
  author = {M R Flick and A J Block},
  year = {1977},
  doi = {10.1016/s0025-7125(16)31268-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/412017/},
  note = {Source identifier: 412017}
}