Spine
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Retrospective, economic analysis. ⋯ 3.
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Prospective cohort study with >10-year follow-up. ⋯ 2.
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A case-control association study. ⋯ 3.
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A finite element study of dynamic response of the lumbar spine to whole-body vibration. ⋯ 5.
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A retrospective chart review with a survey. ⋯ 3.