Circadian variation in ventricular refractoriness.
Friedman
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D001341:Autonomic Nervous System / Q000502:physiology; D002940:Circadian Rhythm / Q000502:physiology*; D006352:Heart Ventricles / Q000294:innervation*; D006801:Humans; D012032:Refractory Period, Electrophysiological / Q000502:physiology*