@misc{indiciae9be93aed96bb,
  title = {Atrial parasystole.},
  author = {H D Friedberg and L Schamroth},
  year = {1970},
  doi = {10.1136/hrt.32.2.172},
  url = {https://pubmed.ncbi.nlm.nih.gov/5440513/},
  note = {Source identifier: 5440513}
}