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Trend of pain indices between groups over time. Error bars show a 95% confidence interval at each recorded time point. CSPPPI - chronic stump pain present pain intensity; PLPPPI - phantom limb pain present pain intensity; CSPNWC - chronic stump pain new chosen words; PLPNWC - phantom limb pain new chosen words; CSPPRI - chronic stump pain pain rating index; PLPPRI - phantom limb pain pain rating index
