Spine
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A retrospective study. ⋯ 3.
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Retrospective database study based on prospectively collected data. ⋯ 3.
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Prospective single-center cohort study. ⋯ 2.
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A prospective study on the clinical, radiographic, and the health-related quality of life (HRQOL) outcomes in adolescents with spondylolisthesis undergoing instrumented circumferential spinal fusion compared with age and sex matched controls. ⋯ 2.
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Retrospective analysis. ⋯ 3.