@misc{indiciaef6cb72ed28a3,
  title = {Retrograde brushing: improved technique using a catheter-tip deflector system.},
  author = {G Parra and W Seery and B Khashu and A T Cole},
  year = {1977},
  doi = {10.1016/s0022-5347(17)58589-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/875140/},
  note = {Source identifier: 875140}
}