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Analgesics, Opioid
Morphine
Oxycodone
Delayed-Action Preparations
Dextromethorphan
Morphine Derivatives
Cytochrome P-450 CYP2D6
Quinidine
Fentanyl
Excitatory Amino Acid Antagonists
Pain
Neoplasms
Somatosensory Disorders
Cachexia
Cross-Over Studies
Double-Blind Method
Injections, Epidural
Patient-Controlled Analgesia
Administration, Cutaneous
Pain Measurement
Co-Publications
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