@misc{indiciaeb103dd449231,
  title = {Thrombectomy for obstructed Björk-Shiley mitral prosthesis.},
  author = {U Kaul and P Venugopal},
  year = {1985},
  doi = {10.1016/0002-8703(85)90058-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/4072902/},
  note = {Source identifier: 4072902}
}