@misc{indiciae9110b9475eea,
  title = {Respiratory depression after extradural morphine.},
  author = {V Christensen},
  year = {1980},
  doi = {10.1093/bja/52.8.841},
  url = {https://pubmed.ncbi.nlm.nih.gov/7426265/},
  note = {Source identifier: 7426265}
}