Spine
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Retrospective case-control study. ⋯ 4.
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A retrospective study. ⋯ 2.
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Case report and systematic review of the literature. ⋯ 4.
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Meta Analysis Comparative Study
Cervical Disc Arthroplasty Versus Anterior Cervical Discectomy and Fusion for Incidence of Symptomatic Adjacent Segment Disease: A Meta-Analysis of Prospective Randomized Controlled Trials.
Meta-analysis of randomized controlled trials. ⋯ 1.