Spine
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Retrospective analysis of Medicare claims linked to a multicenter clinical trial. ⋯ 3.
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A study on acute low back pain (LBP) in consecutive working patients in a multicenter study in general practice. ⋯ N/A.
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Retrospective cohort study. ⋯ 3.
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Retrospective database analysis. ⋯ 3.
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The classification system was derived through a retrospective analysis of 73 consecutive cases of subaxial cervical spine injury as well as thorough literature review. ⋯ 3.