@misc{indiciae636d69fd70a7,
  title = {Endoscopic sphincterotomy.},
  author = {K I Bickerstaff and R W Chapman and B J Britton},
  year = {1989},
  doi = {10.1002/bjs.1800760336},
  url = {https://pubmed.ncbi.nlm.nih.gov/2720336/},
  note = {Source identifier: 2720336}
}