@misc{indiciaef3c396f76011,
  title = {Diagnostic epidural opioid technique.},
  author = {J S Ellis and S Ramamurthy and L S Schoenfeld and J Hoffman and N E Walsh},
  year = {1989},
  doi = {10.1097/00002508-198909000-00003},
  url = {https://pubmed.ncbi.nlm.nih.gov/2520407/},
  note = {Source identifier: 2520407}
}