@misc{indiciaebb5ed5e2f694,
  title = {Fibreoptic colonoscopy.},
  author = {J F O'Grady and J P McMullin and P A Fitzgerald},
  year = {1974},
  url = {https://pubmed.ncbi.nlm.nih.gov/4413462/},
  note = {Source identifier: 4413462}
}