Spine
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A case-control study. ⋯ 4.
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Psychometric testing of the Persian version of Pain Anxiety Symptom Scale 20. ⋯ 3.
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Prospective cross-sectional study. ⋯ 3.
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Observational Study
Patient Reported Outcomes and Revision Rates at a Mean Follow-up of Ten Years After Lumbar Total Disc Replacement.
Prospective observational cohort study. ⋯ 3.