@misc{indiciae6af21dc329d4,
  title = {Letter: Age-coding of endotracheal tubes.},
  author = {B Hogarth},
  year = {1976},
  doi = {10.1111/j.1365-2044.1976.tb12392.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/937708/},
  note = {Source identifier: 937708}
}