Spine
-
Retrospective review of prospectively collected data. ⋯ 4.
-
Prospective cohort. ⋯ 3.
-
Case report. ⋯ 2.
-
Retrospective cohort study. ⋯ 3.
Retrospective review of prospectively collected data. ⋯ 4.
Prospective cohort. ⋯ 3.
Case report. ⋯ 2.
Retrospective cohort study. ⋯ 3.