Spine
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Retrospective cohort study. ⋯ 4.
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A retrospective case series study with at least 10 years of follow-up data. ⋯ 3.
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Comparative Study Observational Study
Increased Fibrogenic Gene Expression in Multifidus Muscles of Patients with Chronic Versus Acute Lumbar Spine Pathology.
Prospective observational study-basic science (Level 1). ⋯ N/A.
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Retrospective cohort study. ⋯ 3.
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A retrospective case series. ⋯ 4.