Spine
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A retrospective review of a prospective, multicenter database. ⋯ 3.
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Systematic review with meta-analysis. ⋯ 1.
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Retrospective evaluation of prospectively collected data. ⋯ 2.
A retrospective review of a prospective, multicenter database. ⋯ 3.
Systematic review with meta-analysis. ⋯ 1.
Retrospective evaluation of prospectively collected data. ⋯ 2.