@misc{indiciae34f111e61da3,
  title = {Premedication with butorphanol. A comparison with morphine.},
  author = {D A Laffey and N H Kay},
  year = {1984},
  doi = {10.1093/bja/56.4.363},
  url = {https://pubmed.ncbi.nlm.nih.gov/6712850/},
  note = {Source identifier: 6712850}
}