@misc{indiciaebfd9654c1f87,
  title = {Elimination of the cloth sewing ring-metal interface in an effort to decrease thromboembolism.},
  author = {A C Beall},
  year = {1989},
  doi = {10.1016/0003-4975(89)90639-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/2774752/},
  note = {Source identifier: 2774752}
}