@misc{indiciaed316c352da37,
  title = {Optimizing single- and double-contrast colon examinations.},
  author = {D W Gelfand and D J Ott and Y M Chen},
  year = {1987},
  url = {https://pubmed.ncbi.nlm.nih.gov/3301216/},
  note = {Source identifier: 3301216}
}