Spine
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A retrospective cohort study with prospectively collected data. ⋯ 3.
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Multicenter case-control study. ⋯ 3.
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Kinematic analysis of swallowing function using videofluoroscopic swallowing study (VFSS). ⋯ 4.
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Clinical case series. ⋯ 4.
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Basic animal research. ⋯ N/A.