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Mean and 95% confidence interval of mean of low frequency/high frequency (LF/HF ratio of heart rate variability during active change in posture, as follows: 5 min supine rest, 5 min back-unsupported sitting, and 5 min upright stance. Data from seven persons with unilateral vestibular failure and seven healthy age/sex matched volunteers at A: day 1, and B: week 2. From (158); used with permission.
