Spine
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Descriptive epidemiology study. ⋯ 4.
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Retrospective study using prospectively collected registry data. ⋯ 3.
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Multicenter Study
What Factors Predict the Risk of Proximal Junctional Failure in the Long Term, Demographic, Surgical or Radiographic? Results from a Time-Dependent ROC Curve.
Retrospective review of prospective multicenter database. ⋯ 4.
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Prospective cohort study. ⋯ 3.