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Meta-analysis of the shivering episodes during the 24 hours following a surgical procedure. (1.8.1) Patients with shivering attacks during the 24 hours following surgical procedure received Fentanyl vs. local anesthetic alone, fixed-effect model was used; (1.8.2) Patients with shivering episodes during the 24 hours following surgical procedure Sufentanil vs. local anesthetic alone, fixed- effect model was used.
