@misc{indiciae9d15061b139d,
  title = {New developments in contrast echocardiography.},
  author = {T J Ryan},
  doi = {10.1016/s0894-7317(88)80033-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/3272798/},
  note = {Source identifier: 3272798}
}