@misc{indiciae596f5df31481,
  title = {The extradural sieve.},
  author = {P A Groves and N E Oriol},
  year = {1994},
  doi = {10.1093/bja/73.3.430-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/7946884/},
  note = {Source identifier: 7946884}
}