@misc{indiciaed6cd831e26c3,
  title = {Patient-controlled analgesia.},
  author = {A G Beeton and P M Upton and E A Shipton},
  year = {1992},
  url = {https://pubmed.ncbi.nlm.nih.gov/1733021/},
  note = {Source identifier: 1733021}
}