Spine
-
Retrospective review. ⋯ 3.
-
A retrospective study. ⋯ 4.
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Case report. ⋯ 5.
-
Retrospective cohort study of a nationwide database. ⋯ 4.
Retrospective review. ⋯ 3.
A retrospective study. ⋯ 4.
Case report. ⋯ 5.
Retrospective cohort study of a nationwide database. ⋯ 4.