Spine
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Prospective experimental study with on-site simulation. ⋯ 4.
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Retrospective study. ⋯ 3.
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This is an in vitro biomechanical study. ⋯ N/A.
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Multicenter Study
Steroid Associated Acute Clinical Worsening and Poor Outcome in Patients with Spinal Dural Arteriovenous Fistulas: A Prospective Cohort Study.
A prospective cohort study. ⋯ 3.
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Prospective multi-center study. ⋯ 2.