@misc{indiciae471297969046,
  title = {Pattern recognition by radiographers.},
  author = {W Simpson and W Urquhart},
  year = {1971},
  doi = {10.1016/s0140-6736(71)92728-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/4101651/},
  note = {Source identifier: 4101651}
}