Spine
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Retrospective case-control study. ⋯ 4.
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Case report. ⋯ 4.
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A retrospective study. ⋯ 2.
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Prospective randomized cohort study. ⋯ 2.
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Review article. ⋯ 4.
Retrospective case-control study. ⋯ 4.
Case report. ⋯ 4.
A retrospective study. ⋯ 2.
Prospective randomized cohort study. ⋯ 2.
Review article. ⋯ 4.