Spine
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This was a retrospective case series at a single institution. ⋯ 3.
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Comparative Study
Comparing the Efficacy of Methods for Immobilizing the Cervical Spine.
This was a prospective simulator study with 16 healthy male subjects. ⋯ 3.
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Retrospective review. ⋯ 3.
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Retrospective observational and case-control study. ⋯ 4.