@misc{indiciae6dcfd7fc1dbd,
  title = {Opioid peptides.},
  author = {J Hughes and H W Kosterlitz},
  year = {1977},
  doi = {10.1093/oxfordjournals.bmb.a071416},
  url = {https://pubmed.ncbi.nlm.nih.gov/193604/},
  note = {Source identifier: 193604}
}