@misc{indiciae7810de9eb614,
  title = {Duodenoscopy.},
  author = {D J Shearman and R R Warwick and I B Macleod and A C Dean},
  year = {1971},
  doi = {10.1016/s0140-6736(71)91903-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4103407/},
  note = {Source identifier: 4103407}
}