@misc{indiciaea23dc29b31fb,
  title = {Cost-effective oxygen therapy.},
  author = {S D Roberts},
  year = {1980},
  doi = {10.7326/0003-4819-93-3-499},
  url = {https://pubmed.ncbi.nlm.nih.gov/6776859/},
  note = {Source identifier: 6776859}
}