@misc{indiciae5b4fce03b209,
  title = {[Morbidity after mitral valve replacement].},
  author = {N Heinz and P Kalmar and E Luckmann and G Rodewald and W Rödiger},
  year = {1972},
  doi = {10.1055/s-0028-1099019},
  url = {https://pubmed.ncbi.nlm.nih.gov/4539100/},
  note = {Source identifier: 4539100}
}