@misc{indiciae8468e2f71a1e,
  title = {Modification of examination couch for sigmoidoscopy.},
  author = {G Nicholson and A D Barr},
  year = {1979},
  doi = {10.1016/s0140-6736(79)92231-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/87730/},
  note = {Source identifier: 87730}
}