@misc{indiciaea415e02b0fb8,
  title = {Nonionic or neutral?},
  author = {M F Tweedle},
  year = {1991},
  doi = {10.1148/radiology.178.3.1994443},
  url = {https://pubmed.ncbi.nlm.nih.gov/1994443/},
  note = {Source identifier: 1994443}
}