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Billman G. E. (2011). Heart rate variability – a historical perspective. Front. Physiol. 2:86. 10.3389/fphys.2011.00086
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Billman G. E. (2013a). The LF/HF ratio does not accurately measure cardiac sympatho-vagal balance. Front. Physiol. 4:26. 10.3389/fphys.2013.00026
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Billman G. E. (2013b). The effect of heart rate on the heart rate variability response to autonomic interventions. Front. Physiol. 4:222. 10.3389/fphys.2013.00222
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Bravi A., Green G., Herry C., Wright H. E., Longtin A., Kenny G. P., et al. (2013). Do physiological and pathological stresses produce different changes in heart rate variability? Front. Physiol. 4:197. 10.3389/fphys.2013.00197
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Carter R., III, Hinojosa-Laborde C., Convertino V. A. (2014). Heart rate variability in patients being treated for dengue viral infection: new insights from mathematical correction of heart rate. Front. Physiol. 5:46. 10.3389/fphys.2014.00046
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