Spine
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Cohort study. ⋯ 3.
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Population-based retrospective descriptive study. ⋯ 4.
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A prospective, nonrandomized cohort study. ⋯ 4.
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A prospective and retrospective cross-sectional cohort analysis. ⋯ 4.
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The aim of this study is to test the effect of cartilage oligomeric matrix protein (COMP) on enhancing rhBMP-2 induced spinal fusion in a prospective 8-week interventional trial of spinal fusion in rats. ⋯ N/A.