Spine
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A retrospective cohort analysis. ⋯ 3.
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Retrospective review of prospective data. ⋯ 3.
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A propensity score matching study. ⋯ 4.
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A retrospective cohort. ⋯ 4.
A retrospective cohort analysis. ⋯ 3.
Retrospective review of prospective data. ⋯ 3.
A propensity score matching study. ⋯ 4.
A retrospective cohort. ⋯ 4.