@misc{indiciae223af16afdef,
  title = {A preliminary human study with a simple nonthrombogenic catheter.},
  author = {R Cramer and R S Frech and K Amplatz},
  year = {1971},
  doi = {10.1148/100.2.421},
  url = {https://pubmed.ncbi.nlm.nih.gov/5147411/},
  note = {Source identifier: 5147411}
}