Spine
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Randomized Controlled Trial Multicenter Study Comparative Study
Long-term Outcomes of the US FDA IDE Prospective, Randomized Controlled Clinical Trial Comparing PCM Cervical Disc Arthroplasty With Anterior Cervical Discectomy and Fusion.
Prospective, multicenter, randomized clinical trial. ⋯ 1.
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Randomized Controlled Trial Comparative Study
A Randomized, Double-blind, Placebo-Controlled Crossover Trial of Oxymorphone Hydrochloride and Propoxyphene/Acetaminophen Combination for the Treatment of Neurogenic Claudication Associated With Lumbar Spinal Stenosis.
Randomized, double-blind, placebo-controlled, single-dose crossover study. ⋯ 2.
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Longitudinal study of the measurement properties of a brief outcome instrument. ⋯ 2.
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A retrospective case-control study. ⋯ 3.