@misc{indiciae27c088452390,
  title = {Enkephalin levels decrease in rat striatum during morphine abstinence.},
  author = {L Bergström and L Terenius},
  year = {1979},
  doi = {10.1016/0014-2999(79)90240-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/575096/},
  note = {Source identifier: 575096}
}