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Examples of test data sets. (A) random numbers within a possible range of a RR intervals (mean 400, S.D. 25). (B),(C),(D) RR intervals from a same infant when the infant was healthy (B), and within 3 to 6 hours prior to an episode of sepsis when the RR interval time series was (C) abnormal with low variability and (D) abnormal with low variability and transient deceleration.
