@misc{indiciaeb611a0af3158,
  title = {Difficult or incomplete flexible sigmoidoscopy: implications for a screening programme.},
  author = {B T Stewart and J O Keck and A V Duncan and N M Santamaria and P Allen},
  year = {1999},
  doi = {10.1046/j.1440-1622.1999.01499.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/9932914/},
  note = {Source identifier: 9932914}
}