@misc{indiciae1236a3528e9c,
  title = {Patient-controlled analgesia.},
  author = {C A Warfield},
  year = {1985},
  doi = {10.1080/21548331.1985.11703089},
  url = {https://pubmed.ncbi.nlm.nih.gov/2861209/},
  note = {Source identifier: 2861209}
}