From: A more than 20-year follow-up of pain and disability after anterior cervical decompression and fusion surgery for degenerative disc disease and comparisons between two surgical techniques
Inclusion criteria
Exclusion criteria
• > 6 months of neck pain and radiculopathy of degenerative origin
• MRI and clinical findings of cervical nerve root compression
• myelopathy
• psychiatric disorder
• drug abuse
• previous spine surgery