@misc{indiciae793e65209c50,
  title = {Valve replacement using heterografts. Clinical experience.},
  author = {K Kubo and E Mazzei and D G Mulder},
  year = {1971},
  doi = {10.1001/archsurg.1971.01350060026009},
  url = {https://pubmed.ncbi.nlm.nih.gov/5577047/},
  note = {Source identifier: 5577047}
}