Spine
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A prospective multicenter cohort study. ⋯ 3.
-
Retrospective review of prospectively collected data. ⋯ 2.
-
Retrospective uncontrolled case series. ⋯ 4.
A prospective multicenter cohort study. ⋯ 3.
Retrospective review of prospectively collected data. ⋯ 2.
Retrospective uncontrolled case series. ⋯ 4.