Spine
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Retrospective case series. ⋯ 3.
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A biomechanical cadaveric study in lumbar calf spine. ⋯ N/A.
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Retrospective review of a prospectively collected database. ⋯ 4.
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Retrospective analysis of prospectively collected data from the 2001 to 2010 Nationwide Inpatient Sample database. ⋯ 2.
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Single-center retrospective study. ⋯ 4.