@misc{indiciaeb04231c6ef8d,
  title = {Endoscopic retrograde cholangiography.},
  author = {R E Paul},
  year = {1976},
  doi = {10.1016/0037-198x(76)90055-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/941041/},
  note = {Source identifier: 941041}
}