@misc{indiciae4320e68e3065,
  title = {Butorphanol and biliary spasm.},
  author = {P F Dolan},
  year = {1985},
  doi = {10.1097/00000542-198509000-00031},
  url = {https://pubmed.ncbi.nlm.nih.gov/4025903/},
  note = {Source identifier: 4025903}
}