@misc{indiciae5e0e7300fe54,
  title = {Gallstone ileus.},
  author = {Hugo W Nijhof and Maarten W G A Bronkhorst},
  year = {2006},
  doi = {10.1159/000094752},
  url = {https://pubmed.ncbi.nlm.nih.gov/16874001/},
  note = {Source identifier: 16874001}
}