@misc{indiciaed0a0504a4e9e,
  title = {Endogenous opiates-a progress report.},
  author = {R S Henderson},
  year = {1977},
  doi = {10.1177/0310057x7700500207},
  url = {https://pubmed.ncbi.nlm.nih.gov/17321/},
  note = {Source identifier: 17321}
}