Spine
-
Retrospective analysis. ⋯ 3.
-
Prospective subcohort study. ⋯ 2.
-
Observational Study
Cervical spine clearance protocols in level 1 trauma centers in the United States.
Observational, cross-sectional. ⋯ 4.
Retrospective analysis. ⋯ 3.
Prospective subcohort study. ⋯ 2.
Observational, cross-sectional. ⋯ 4.