@misc{indiciae8c7cb6ba39b8,
  title = {Descending modulation in persistent pain: an update.},
  author = {Ke Ren and Ronald Dubner},
  year = {2002},
  doi = {10.1016/s0304-3959(02)00368-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/12435453/},
  note = {Source identifier: 12435453}
}