Taking account of causes—Are you sure?

References 

1. Janda V. In:  Grant R editors. Physical Therapy in the Cervical and Thoracic Spine. New York: Churchill Livingstone; 1988;
2. Grieve G. Modern Manual Therapy. London: Churchill Livingstone; 1986;
3. Gofton J, Trueman G. Studies in osteoarthritis of the hip: Part II. Osteoarthritis of the hip and leg-length disparity. CMA Journal. 1971;104:791–799