1. Available at: http://www.chirobase.org/07Strategy/AHCPR/ahcprclinician.html. Accessed March 18, 2012.
2. Diagnosis and treatment of low back pain: a joint clinical practice guideline from the American College of Physicians and the American Pain Society;Chou;Ann Intern Med,2007
3. Acute low back pain: systematic review of its prognosis;Pengel;BMJ,2003
4. Chou R, Huffman L. Evaluation and management of low back pain: evidence review. American Pain Society, in press.