@misc{indiciaeb7147b209cb0,
  title = {Peripheral venous contrast echocardiography.},
  author = {J B Seward and A J Tajik and D J Hagler and D G Ritter},
  year = {1977},
  doi = {10.1016/s0002-9149(77)80192-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/835477/},
  note = {Source identifier: 835477}
}