Spine
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Retrospective study. ⋯ 3.
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Retrospective study. ⋯ 4.
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Retrospective review of a database cohort. ⋯ 3.
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The study is a cross-sectional, diagnostic validity study. ⋯ 4.
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Observational Study
Opioid Prescribing Patterns for Low Back Pain Among Commercially-Insured Children.
: Level of Evidence: 3.