@misc{indiciaee4d4360e4c07,
  title = {Digital subtraction in defecography.},
  author = {A P Brady and S Somers and D Hough and G W Stevenson},
  doi = {10.1007/bf00200406},
  url = {https://pubmed.ncbi.nlm.nih.gov/7620417/},
  note = {Source identifier: 7620417}
}