1. Back pain and sciatica;Frymoyer;N Engl J Med,1988
2. Diagnosis and management of acute low back pain;Patel;Am Fam Physician,2000
3. Diagnosis and management of acute low back pain;Patel;Am Fam Physician,2000
4. Low back pain: Differentiating mechanical and medical causes;Rubin;Hops Med,1995
5. Patients with low back pain: How to identify the few who need extra attention;Connelly;Postgrad Med,1996