Spine
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Retrospective analysis. ⋯ 3.
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Prospective subcohort study. ⋯ 2.
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Observational Study
Cervical spine clearance protocols in level 1 trauma centers in the United States.
Observational, cross-sectional. ⋯ 4.
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Comparative Study
Risk factors of adjacent segment disease requiring surgery after lumbar spinal fusion: comparison of posterior lumbar interbody fusion and posterolateral fusion.
A retrospective study. ⋯ 3.