Spine
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A retrospective study. ⋯ 3.
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Prospective cross-sectional study. ⋯ 3.
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A retrospective study. ⋯ 3.
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A retrospective observational study. ⋯ N/A.
A retrospective study. ⋯ 3.
Prospective cross-sectional study. ⋯ 3.
A retrospective study. ⋯ 3.
A retrospective observational study. ⋯ N/A.