Spine
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Retrospective patient series analysis with update of long-term data. ⋯ 4.
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A descriptive analysis of secondary data. ⋯ 3.
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This is a retrospective cases study from a prospective patient register. ⋯ 3.
Retrospective patient series analysis with update of long-term data. ⋯ 4.
A descriptive analysis of secondary data. ⋯ 3.
This is a retrospective cases study from a prospective patient register. ⋯ 3.