@misc{indiciae392c913c3f20,
  title = {Relative analgesia. An introductory note.},
  author = {W A Allen},
  year = {1972},
  doi = {10.1038/sj.bdj.4802870},
  url = {https://pubmed.ncbi.nlm.nih.gov/4507100/},
  note = {Source identifier: 4507100}
}