@misc{indiciae9b2370f934ea,
  title = {Endogenous opiates and fasting.},
  author = {A Ettenberg and J Rogers and G F Koob and F E Bloom and J A Deutsch},
  year = {1981},
  doi = {10.1126/science.6267697},
  url = {https://pubmed.ncbi.nlm.nih.gov/6267697/},
  note = {Source identifier: 6267697}
}