@misc{indiciae5fe62c414d38,
  title = {Fentanyl for sedation during upper gastrointestinal endoscopy.},
  author = {S Ishido and Y Kinoshita and N Kitajima and T Itoh and K Nishiyama and M Tojo and T Yano and T Inatome and H Fukuzaki and T Chiba},
  doi = {10.1016/s0016-5107(92)70565-3},
  url = {https://pubmed.ncbi.nlm.nih.gov/1473671/},
  note = {Source identifier: 1473671}
}