@misc{indiciae1d51b76b1a5c,
  title = {Radiographic contrast agents--a perspective.},
  author = {M A Bettmann},
  year = {1987},
  doi = {10.1056/nejm198710013171408},
  url = {https://pubmed.ncbi.nlm.nih.gov/3627209/},
  note = {Source identifier: 3627209}
}