@misc{indiciae72220807d063,
  title = {Clinical differences in spinal opioid efficacy.},
  author = {S Organowski and P G Duncan},
  year = {1989},
  doi = {10.1007/bf03005345},
  url = {https://pubmed.ncbi.nlm.nih.gov/2758543/},
  note = {Source identifier: 2758543}
}