@misc{indiciae40f0f9b58d3a,
  title = {ERCP.},
  author = {P B Cotton},
  year = {1977},
  doi = {10.1136/gut.18.4.316},
  url = {https://pubmed.ncbi.nlm.nih.gov/324875/},
  note = {Source identifier: 324875}
}