Om hvordan forskjellige behandlingsformer egentlig ikke har så mye forskjellige resultater på smerter…

http://www.ncbi.nlm.nih.gov/m/pubmed/14973958/

Spinal manipulative therapy had no statistically or clinically significant advantage over general practitioner care, analgesics, physical therapy, exercises, or back school. Results for patients with chronic low-back pain were similar.

Radiation of pain, study quality, profession of manipulator, and use of manipulation alone or in combination with other therapies did not affect these results.