@misc{indiciae759acf3f7916,
  title = {Circulating opioids: possible physiological roles in central nervous function.},
  author = {J L Henry},
  year = {1982},
  doi = {10.1016/0149-7634(82)90040-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/6184658/},
  note = {Source identifier: 6184658}
}