@misc{indiciae00e3aa33ea25,
  title = {Proceedings: Echocardiology.},
  author = {J Roelandt and W G van Dorp and P van Zeller},
  year = {1975},
  url = {https://pubmed.ncbi.nlm.nih.gov/1215914/},
  note = {Source identifier: 1215914}
}