Spine
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Multicenter case-control study. ⋯ 3.
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Cross-Sectional Cohort Study OBJECTIVE.: To describe age-stratified normative values of novel occipitocervical, cervical, and cervicothoracic alignment parameters. ⋯ 4.
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Clinical case series. ⋯ 4.
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A Cochrane systematic review. ⋯ 1.