Spine
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In vitro study. ⋯ 3.
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A case-control association study. ⋯ Level III.
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Multicenter Study
Patient Reported Data as Predictors of Surgical Outcome in Patients with Degenerative Cervical Myelopathy. Analysis of a National Multicenter Dataset.
Retrospective study design on prospectively collected registry data. ⋯ III.