@misc{indiciae9fafe422ec07,
  title = {Fenestrated tracheostomy tubes.},
  author = {M J Lange},
  year = {1973},
  doi = {10.1016/s0140-6736(73)92303-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4124920/},
  note = {Source identifier: 4124920}
}