1. Expenditures and health status among adults with back and neck problems;Kumar;JAMA,2008
2. Rational for manual therapy;Basmajian,1993
3. The association of pain with physical activities in chronic low back pain;Rainville;Spine,1992
4. A comparison of five low back disability questionnaires: reliability and responsiveness;Davidson;Phys Ther,2002
5. Relationship between spinal mobility, physical performance, pain intensity and functional disability in patients with chronic low back pain;Odebiyi;NJMR,2006