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Results for a 70-year-old male in Group 1. Upper graph: Systolic and diastolic blood pressure taken on each visit by date Middle graph: 20-minute (m) measurement of LF/HF (low-frequency–to–high frequency) ratio after needling with needles in place. Lower graph: Intratreatment LF/HF first 5 minutes to second 5-minute segment as an average over all treatment sessions.
