@misc{indiciaee4a45f78cd81,
  title = {Endogenous opiates: 1990.},
  author = {G A Olson and R D Olson and A J Kastin},
  doi = {10.1016/0196-9781(91)90227-g},
  url = {https://pubmed.ncbi.nlm.nih.gov/1815228/},
  note = {Source identifier: 1815228}
}