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A bar diagram demonstrating the baseline burden of degenerative parameters in the individual components of the lumbar intervertebral discs of patients <25 years old and presenting with low back pain caused by stress reaction in the posterior elements of the lumbar vertebrae. Stressed discs refer to intervertebral discs attached to the vertebra with increased bony stresses. Control discs refer to discs not in contact with stressed vertebra, but with otherwise equivalent axial loading.
