Spine
-
Single-institution, retrospective case series. ⋯ 4.
-
Retrospective cohort study. ⋯ 3.
-
Nonrandomized trial. ⋯ N/A.
Single-institution, retrospective case series. ⋯ 4.
Retrospective cohort study. ⋯ 3.
Nonrandomized trial. ⋯ N/A.