@misc{indiciae8d5e0ae828fd,
  title = {Variable stiffening device for colonoscopy.},
  author = {M J Sullivan},
  doi = {10.1016/s0016-5107(90)71208-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/2279681/},
  note = {Source identifier: 2279681}
}