Spine
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A retrospective case-control study. ⋯ 3.
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Cross-sectional study. ⋯ 3.
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Review of TRICARE claims (2006-2014) data to assess Emergency Department (ED) utilization following spine surgery. ⋯ 3.
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Multicenter prospective. ⋯ 2.
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A retrospective matched-cohort comparative study. ⋯ 3.