Spine
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Retrospective cohort study using medical claims data. ⋯ 4.
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Retrospective clinical study. ⋯ 4.
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A descriptive epidemiology study. ⋯ N/A.
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An intra- and interobserver reliability study. ⋯ 3.
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This is a cross-sectional analysis of resonance magnetic images of 111 patients with craniocervical malformations and those of normal subjects. ⋯ N/A.