Spine
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Retrospective cross-sectional cohort. ⋯ 4.
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A controlled radiologic follow-up study. ⋯ 2.
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Meta Analysis
Ischemic Optic Neuropathy following Spine Surgery: Case Series and Systematic Review of the Literature.
Case-control analysis and systematic literature review. ⋯ 3.
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Prospective cohort study. ⋯ 3.