Gender-specific patterns of external occipital protuberance hyperplasia: associations with nuchal ligament ossification and cervical sagittal imbalance in myelopathy patients. - Gong, Zhaoyang; Sun, Hanqiu; Li, Dachuan; Lu, Xiao; Liu, Siyang; Wang, Ximeng; Xia, Xinlei; Lyu, Feizhou; Jiang, Jianyuan; Zou, Fei; Wang, Hongli; Ma, Xiaosheng (Asian Spine Journal, 2026)