Spine
-
Cross-sectional study. ⋯ 3.
-
Cross-sectional study. ⋯ 4.
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A systematic review of nonspecific low back pain trials published between 1980 and 2012. ⋯ 3.
-
Retrospective review. ⋯ N A.
Cross-sectional study. ⋯ 3.
Cross-sectional study. ⋯ 4.
A systematic review of nonspecific low back pain trials published between 1980 and 2012. ⋯ 3.
Retrospective review. ⋯ N A.