Spine
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Retrospective case-control study. ⋯ 4.
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An in vitro, cadaveric biomechanical study. ⋯ 2.
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A retrospective cohort study. ⋯ 4.
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Retrospective review of prospectively collected data. ⋯ 3.
Retrospective case-control study. ⋯ 4.
An in vitro, cadaveric biomechanical study. ⋯ 2.
A retrospective cohort study. ⋯ 4.
Retrospective review of prospectively collected data. ⋯ 3.