@misc{indiciae0947b0d9d048,
  title = {An epidural introducer.},
  author = {A Singh and M A Elloy},
  year = {1972},
  doi = {10.1093/bja/44.10.1105},
  url = {https://pubmed.ncbi.nlm.nih.gov/4639832/},
  note = {Source identifier: 4639832}
}