Spine
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A retrospective study of prospectively collected data. ⋯ 3.
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Retrospective study. ⋯ 4.
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A prospective cohort study. ⋯ 2.
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A cross-sectional comparison of vertebral morphology and lumbar lordosis (LL) in adolescents with and without spondylolysis. ⋯ 4.
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Subanalysis of the prospective AOSpine CSM North America and International studies. ⋯ 3.