@misc{indiciaeb377ca01093f,
  title = {Epidural morphine.},
  author = {E Mathews},
  year = {1979},
  doi = {10.1016/s0140-6736(79)91121-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/85912/},
  note = {Source identifier: 85912}
}