Inferring vagal tone from heart rate variability.
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D001016:Aortic Bodies / Q000502:physiology*; D001146:Arrhythmia, Sinus; D003645:Death, Sudden; D006321:Heart / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D011379:Prognosis