Spine
-
Prospective study. ⋯ 3.
-
Systematic review. ⋯ 1.
-
A retrospective cohort study of a nationwide sample database. ⋯ 4.
-
Retrospective cohort. ⋯ 4.
Prospective study. ⋯ 3.
Systematic review. ⋯ 1.
A retrospective cohort study of a nationwide sample database. ⋯ 4.
Retrospective cohort. ⋯ 4.