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Heart rate variability: Standards of measurement, physiological interpretation, and clinical use

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A Real-Time QRS Detection Algorithm

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Power Spectrum Analysis of Heart Rate Fluctuation: A Quantitative Probe of Beat-to-Beat Cardiovascular Control

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Quantification of scaling exponents and crossover phenomena in nonstationary heartbeat time series

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A Survey on Wearable Sensor-Based Systems for Health Monitoring and Prognosis

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