@misc{indiciae0cc2b9563dd6,
  title = {Training in retrograde intubation.},
  author = {H Guggenberger and G Lenz},
  year = {1988},
  doi = {10.1097/00000542-198808000-00040},
  url = {https://pubmed.ncbi.nlm.nih.gov/3407991/},
  note = {Source identifier: 3407991}
}