Spine
-
Questionnaire translation and validation. ⋯ 2.
-
International web-based survey. ⋯ 4.
-
Retrospective database review. ⋯ 4.
Questionnaire translation and validation. ⋯ 2.
International web-based survey. ⋯ 4.
Retrospective database review. ⋯ 4.