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Time-scale dependence of the non-Gaussianity index, λ2. The results for (A) multiple system atrophy (MSA), (B) Parkinson disease (PD), and (C) congestive heart failure (CHF) patients, both for survivor (SV; n = 69) and non-survivor (NS; n = 39). Age-matched controls were selected from a database of healthy subjects. Error bars indicate 95%-confidence intervals of the group averages.
