@misc{indiciae4cf5dd068625,
  title = {Quantitative echo contrast concentration measurement by Doppler sonography.},
  author = {K Q Schwarz and G P Bezante and X Chen and R Schlief},
  year = {1993},
  doi = {10.1016/0301-5629(93)90101-s},
  url = {https://pubmed.ncbi.nlm.nih.gov/8346603/},
  note = {Source identifier: 8346603}
}