Spine
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A retrospective database study. ⋯ 3.
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A retrospective cohort analysis of prospectively collected clinical data. ⋯ 3.
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A case report. ⋯ 4.
A retrospective database study. ⋯ 3.
A retrospective cohort analysis of prospectively collected clinical data. ⋯ 3.
A case report. ⋯ 4.