@misc{indiciae6bd18c23582a,
  title = {Congenital mitral stenosis.},
  author = {R L van der Horst and A R Hastreiter},
  year = {1967},
  doi = {10.1016/0002-9149(67)90389-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/6058371/},
  note = {Source identifier: 6058371}
}