@misc{indiciae8f26f96a4a06,
  title = {Endotracheal suction.},
  author = {D W Bethune and J M Collis and C M Wotherspoon},
  year = {1971},
  doi = {10.1111/j.1365-2044.1971.tb04851.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4939229/},
  note = {Source identifier: 4939229}
}