@misc{indiciaeff0b2cc8bf50,
  title = {Difficult tracheal extubation.},
  author = {S Lang and D H Johnson and D T Lanigan and H Ha},
  year = {1989},
  doi = {10.1007/bf03010778},
  url = {https://pubmed.ncbi.nlm.nih.gov/2720875/},
  note = {Source identifier: 2720875}
}