Spine
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This was a retrospective study using national administrative data from the MarketScan database. ⋯ 3.
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Retrospective review of prospectively-collected, multicenter adult spinal deformity (ASD) database. ⋯ 3.
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Retrospective multi-center study. ⋯ 3.
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Systematic review. ⋯ 4.
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Retrospective cohort study. ⋯ 3.