@misc{indiciaef901863f0640,
  title = {Respiratory therapy.},
  author = {J M Collis},
  year = {1969},
  doi = {10.1097/00004311-196907040-00006},
  url = {https://pubmed.ncbi.nlm.nih.gov/4922176/},
  note = {Source identifier: 4922176}
}