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The measured PIF (obtained through PP stimulation) and the estimated PÎF (obtained through RIT stimulation and Poisson–Volterra analysis) for LPP (A) and MPP (B) using a third-order Poisson-Volterra model, and for LPP (C) and MPP (D) using a second-order Poisson–Volterra model. The dotted lines show ± one standard deviation for the RIT case and the bars show the standard deviation range for the PP case.
