@misc{indiciae340b161e9406,
  title = {Sinus node function and conduction system before and after surgery for secundum atrial septal defect: an electrophysiologic study.},
  author = {M Bolens and B Friedli},
  year = {1984},
  doi = {10.1016/s0002-9149(84)90825-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/6720586/},
  note = {Source identifier: 6720586}
}