@misc{indiciae29444b5eec97,
  title = {Endogenous opiates: 1997.},
  author = {G A Olson and R D Olson and A L Vaccarino and A J Kastin},
  year = {1998},
  doi = {10.1016/s0196-9781(98)00137-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/9880086/},
  note = {Source identifier: 9880086}
}