@misc{indiciae2d3ca8493bc0,
  title = {Endogenous opiates: 1993.},
  author = {G A Olson and R D Olson and A J Kastin},
  year = {1994},
  doi = {10.1016/0196-9781(94)90131-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/7700854/},
  note = {Source identifier: 7700854}
}