@misc{indiciaeae4804336181,
  title = {Heart rate variability: origins, methods, and interpretive caveats.},
  author = {G G Berntson and J T Bigger and D L Eckberg and P Grossman and P G Kaufmann and M Malik and H N Nagaraja and S W Porges and J P Saul and P H Stone and M W van der Molen},
  year = {1997},
  doi = {10.1111/j.1469-8986.1997.tb02140.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/9401419/},
  note = {Source identifier: 9401419}
}