Spine
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Multicenter Study
Impact of Chronic DMARD therapy in Patients with Rheumatoid Arthritis undergoing Surgery of the Craniovertebral Junction: A Multi-center Retrospective Study.
A multi-centered retrospective review from five institutions. ⋯ 3.
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Multicenter Study Clinical Trial
Weekly Teriparatide versus Bisphosphonate for Bone Union during Six Months after Multi-Level Lumbar Interbody Fusion for Osteoporotic Patients: A Multicenter, Prospective, Randomized Study.
Multicenter, prospective randomized study. ⋯ 1.
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Multicenter Study
Risk Factors of Nonunion After Acute Osteoporotic Vertebral Fractures: A Prospective Multicenter Cohort Study.
Prospective cohort study. ⋯ 2.
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Retrospective review of prospectively collected database. ⋯ 3.
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Retrospective case analyses. ⋯ 4.