@misc{indiciae033acabad2f9,
  title = {Endogenous opiates: 1996.},
  author = {G A Olson and R D Olson and A J Kastin},
  year = {1997},
  doi = {10.1016/s0196-9781(97)00264-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/9437729/},
  note = {Source identifier: 9437729}
}