@misc{indiciaecfb7fc4faf67,
  title = {Endogenous opiates and the digestive system.},
  author = {S J Konturek},
  year = {1978},
  doi = {10.3109/00365527809179817},
  url = {https://pubmed.ncbi.nlm.nih.gov/384499/},
  note = {Source identifier: 384499}
}