@misc{indiciaeea280ca405d5,
  title = {Unblocking tracheal tubes.},
  author = {J Sizer and J M Pierce},
  year = {1992},
  doi = {10.1111/j.1365-2044.1992.tb02154.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/1567012/},
  note = {Source identifier: 1567012}
}