Spine
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Retrospective cohort study. ⋯ 3.
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A retrospective cohort study. ⋯ 3.
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Retrospective survival analysis of 44 undifferentiated high grade pleomorphic sarcoma (UPS) of the spine. ⋯ 4.
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A retrospective cohort study of prospectively collected data. ⋯ 3.
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Retrospective analysis. ⋯ 3.