Spine
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A retrospective radiographic study. ⋯ 3.
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Retrospective study of prospectively collected data. ⋯ 4.
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Retrospective study of postoperative outcomes of adult spinal deformity (ASD) surgery. ⋯ 3.
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Retrospective cohort study. ⋯ 3.
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A retrospective analysis. ⋯ 3.