| http://www.w3.org/ns/prov#value | - ystolic blood pressure provided by said calibration device as said calibration signal, according to a piecewise-linear formula ??1(t)=??0-2??df/(a1+b1P(t)), where a1 is an offset variable and b1 is a slope variable, and according to a second piecewise-linear formula ??2(t)=??0-2??df/(a2+b2P(t)), where a2 is an offset variable and b2 is a slope variable; and processing said calibration signal and s
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