@misc{indiciaec09c672e7061,
  title = {Epidural opioid requirements.},
  author = {O A de Leon-Casasola and M J Lema},
  year = {1991},
  doi = {10.1097/00000542-199106000-00035},
  url = {https://pubmed.ncbi.nlm.nih.gov/1710429/},
  note = {Source identifier: 1710429}
}