@misc{indiciaec5b3bc735338,
  title = {Left ventricular outflow tract obstruction.},
  author = {R S Freedberg and I Kronzon},
  year = {1989},
  doi = {10.1002/ccd.1810180219},
  url = {https://pubmed.ncbi.nlm.nih.gov/2790952/},
  note = {Source identifier: 2790952}
}