@misc{indiciaeb03c170087b6,
  title = {Colonoscopy.},
  author = {C Williams and R Teague},
  year = {1973},
  doi = {10.1136/gut.14.12.990},
  url = {https://pubmed.ncbi.nlm.nih.gov/4594336/},
  note = {Source identifier: 4594336}
}