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Strategies for prevention of lower limb post-amputation pain: A clinical narrative review.

J Anaesthesiol Clin Pharmacol · 2018 · PMC6360885 · PMID 30774224

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, in a randomized controlled trial, showed that the PLP was lower in patients receiving IV ketamine but failed to reach statistical significance at 6 months (Level II).[ 52 ] Recently, in a retrospective observational study,[ 54 ] data collection is going on for patients who received IV ketamine within 30 days of limb amputation.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.