Spine
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Observational Study
Design and Validation of a Spinal Surgical Navigation System Based on Spatial Augmented Reality.
Prospective observational study. ⋯ N/A.
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Prospective 2-year study with operative sampling and in-vitro analysis of chromium ions following spinal surgery in children. ⋯ 2.
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Retrospective case-control study. ⋯ 4.
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A retrospective study. ⋯ 3.
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Retrospective database study based on prospectively collected data. ⋯ 3.