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Cervical alignment comparison using sagittal radiographs in neutral position. (a) Using Cobb angle (white lines), the C2-C7 spine’s global curvature was initially determined to be –5°, indicating a reversed cervical lordosis. (b) At a 12-month follow-up, the cervical lordosis was corrected by 25° (–5° vs. 20°) using the C2-C7 spine Cobb angle
