@misc{indiciaec90bab4fd007,
  title = {Epidural versus intravenous fentanyl: a problem with small sample size.},
  author = {R Slover and S K Palmer},
  year = {1991},
  doi = {10.1097/00000542-199104000-00034},
  url = {https://pubmed.ncbi.nlm.nih.gov/2008964/},
  note = {Source identifier: 2008964}
}