Assertion: blood pressure | /r/HasProperty | characterized by marked short-term fluctuations
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text: However, blood pressure changes naturally, a fact that cardiologists explored while writing about blood-pressure variability in Nature in March 2013: “Blood pressure is characterized by marked short-term fluctuations occurring within a 24-hour period (beat-to-beat, minute-to-minute, hour-to-hour, and day-to-night changes) and also by long-term fluctuations occurring over more prolonged periods of time (days, weeks, months, seasons, and even years).