Øystein Nygaard

Randomized Clinical Trial of Lumbar Instrumented Fusion and Cognitive Intervention and Exercises in Patients with Chronic Low Back Pain and Disc Degeneration

Inger Holm, Hege R. Eriksen, Anne Keller, 2003, Spine.

Proton magnetic resonance spectroscopy of cerebrospinal fluid in neurodegenerative disease: Indication of glial energy impairment in Huntington chorea, but not Parkinson disease

Jan Aasly, Ursula Sonnewald, L. White, 2000, Journal of neuroscience research.

The Impact of Body Mass Index on the Prevalence of Low Back Pain: The HUNT Study

Ivar Heuch, Ivar Heuch, I. Heuch, 2010, Spine.