@misc{indiciae0257a09a9674,
  title = {Duodenoscopy.},
  author = {P R Salmon and P Brown and T Htut and R Burwood and A E Read},
  year = {1971},
  doi = {10.1016/s0140-6736(71)91813-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/4104750/},
  note = {Source identifier: 4104750}
}