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Analgesia, Epidural
Orthopedic Procedures
Nerve Block
Drug Therapy, Combination
Hip
Knee
Bupivacaine
Adrenergic alpha-Agonists
Fentanyl
Clonidine
Analgesics, Opioid
Local Anesthetics
Drug Combinations
Pain, Postoperative
Pain Measurement
Models, Statistical
Regression Analysis
Biological Models
Drug Interactions
Co-Publications
4
3
1
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