@misc{indiciaea9a86ea7a34f,
  title = {Blocked or non-functioning cannulae.},
  author = {P T Walling},
  year = {1973},
  doi = {10.1093/bja/45.3.304},
  url = {https://pubmed.ncbi.nlm.nih.gov/4699260/},
  note = {Source identifier: 4699260}
}