@misc{indiciaeec27d1f0e131,
  title = {Endogenous opiates: 1992.},
  author = {G A Olson and R D Olson and A J Kastin},
  doi = {10.1016/0196-9781(93)90195-m},
  url = {https://pubmed.ncbi.nlm.nih.gov/8134316/},
  note = {Source identifier: 8134316}
}