Spine
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Comparative Study
Adjacent segment disease after anterior cervical discectomy and fusion: clinical outcomes after first repeat surgery versus second repeat surgery.
Retrospective clinical study. ⋯ 3.
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Retrospective review. ⋯ 3.
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A prospective clinical study. ⋯ 4.
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Retrospective cohort study. ⋯ 2.
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Review Case Reports
Osteoblastoma of the sacrum: report of 18 cases and analysis of the literature.
Retrospective case series. ⋯ 4.