Spine
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Retrospective patient series analysis with update of long-term data. ⋯ 4.
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A retrospective review of prospectively collected data. ⋯ 3.
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Case-control study. ⋯ 3.
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Microstructural investigation of compression-induced herniation of ovine lumbar discs with and without added component of anterior-inferior slope. ⋯ N/A.
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A systematic review. ⋯ 4.