@misc{indiciaed263dd4d6243,
  title = {Percutaneous tracheostomy insertion can be difficult.},
  author = {A E Cooper},
  year = {1991},
  doi = {10.1111/j.1365-2044.1991.tb09951.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1781556/},
  note = {Source identifier: 1781556}
}