@misc{indiciaebc3be153a9fe,
  title = {Fibreoptic colonoscopy.},
  author = {J A Fox and L Provenzale and A Revignas},
  year = {1970},
  doi = {10.1016/s0140-6736(70)92687-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/4193347/},
  note = {Source identifier: 4193347}
}