@misc{indiciaeaae55fdf5aa5,
  title = {Duodenal intubation.},
  author = {W G Linscheer and H R Nater},
  year = {1972},
  doi = {10.1016/s0140-6736(72)90987-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4113523/},
  note = {Source identifier: 4113523}
}