@misc{indiciae3e33f0d72b19,
  title = {Spontaneous echo contrast in mechanical valve prosthesis.},
  author = {T O Cheng},
  year = {1997},
  doi = {10.1016/s0003-4975(97)83874-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/9205206/},
  note = {Source identifier: 9205206}
}