@misc{indiciae97b08de016b3,
  title = {Prolonged release extradural morphine.},
  author = {E C Howard and G R Murray and T N Calvey and N E Williams},
  year = {1985},
  url = {https://pubmed.ncbi.nlm.nih.gov/3966787/},
  note = {Source identifier: 3966787}
}