@misc{indiciae9493fa7d0b0d,
  title = {Opioids in labour.},
  author = {W A Liston},
  year = {1997},
  doi = {10.1016/s0140-6736(05)60163-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/9078217/},
  note = {Source identifier: 9078217}
}