@misc{indiciae4b0599c3ff55,
  title = {Electrophysiological testing of sinus node function.},
  author = {A Helfgott},
  year = {1985},
  doi = {10.1111/j.1540-8159.1985.tb05785.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2582396/},
  note = {Source identifier: 2582396}
}