@misc{indiciaed42a4d1fe66a,
  title = {How far down the duodenum?},
  author = {J C Nicholls and P A Smith},
  year = {1981},
  doi = {10.1136/bmj.282.6271.1223},
  url = {https://pubmed.ncbi.nlm.nih.gov/6788142/},
  note = {Source identifier: 6788142}
}