@misc{indiciaea655d66246eb,
  title = {Endogenous opiates: 1988.},
  author = {G A Olson and R D Olson and A J Kastin},
  doi = {10.1016/0196-9781(89)90020-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2695901/},
  note = {Source identifier: 2695901}
}