@article{10_3389_fphys_2013_00026,
  title = {The LF/HF ratio does not accurately measure cardiac sympatho-vagal balance},
  author = {George E. Billman},
  journal = {Frontiers in Physiology},
  year = {2013},
  doi = {10.3389/fphys.2013.00026},
  url = {https://doi.org/10.3389/fphys.2013.00026}
}