@misc{indiciae718c7847c55f,
  title = {Pre-emptive extradural analgesia.},
  author = {P A Hardy},
  year = {1993},
  doi = {10.1093/bja/70.4.493},
  url = {https://pubmed.ncbi.nlm.nih.gov/8499221/},
  note = {Source identifier: 8499221}
}