@misc{indiciae3d52dddd520c,
  title = {Endogenous opiates: through 1978.},
  author = {G A Olson and R D Olson and A J Kastin and D H Coy},
  year = {1979},
  doi = {10.1016/0149-7634(79)90014-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/232257/},
  note = {Source identifier: 232257}
}