Spine
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A prospective cohort study with a 7-week follow-up of 113 patients with chronic neck pain undergoing physiotherapy. ⋯ N/A.
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Cross-sectional study. ⋯ 2.
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Retrospective study of Nationwide Inpatient Sample (NIS). ⋯ 3.
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Retrospective case series. ⋯ 4.
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National registry cohort study. ⋯ 3.