Spine
-
Delphi process with multiple iterative rounds using a nominal group technique. ⋯ 5.
-
Retrospective cohort comparative study. ⋯ 3.
-
Consecutive case series. ⋯ 4.
Delphi process with multiple iterative rounds using a nominal group technique. ⋯ 5.
Retrospective cohort comparative study. ⋯ 3.
Consecutive case series. ⋯ 4.