| http://www.w3.org/ns/prov#value | - FIG. 11 is a graph obtained by: removably attaching a holter monitor and a photoelectric pulse wave sensor onto a subject; concurrently measuring an electrocardiogram and a pulse waveform for a certain period; obtaining electrocardiogram RR-intervals and pulse wave peak-to-peak intervals based on the electrocardiogram and the pulse waveform; and displaying the electrocardiogram RR-intervals and th
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