@misc{indiciaee711d2d52bf6,
  title = {[Difficulties in diagnosing mitral valve prolapse].},
  author = {V A Bobrov and L A Aleksandrova and A I Frolov},
  year = {1989},
  url = {https://pubmed.ncbi.nlm.nih.gov/2711670/},
  note = {Source identifier: 2711670}
}