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Pain, Postoperative
Pain Measurement
Prospective Studies
Drug Dose Response Relationship
Analgesics, Opioid
Dextromethorphan
Morphine
Lidocaine
Meperidine
Local Anesthetics
Fentanyl
Receptors, N-Methyl-D-Aspartate
Cytokines
Double-Blind Method
General Anesthesia
Analgesia, Epidural
Anesthesia, Epidural
Patient-Controlled Analgesia
Wistar Rats
Rats
Co-Publications
55
43
17
14
10
9
8
7
6
4
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