AUTHOR=Li Jiawei , Wu Baishan , Wang Xiaochen , Zhao Lijuan , Cui Jie , Liu Jing , Guo Kaikai , Zhang Xiaoyu , Liu Juan TITLE=Clinical features, risk factors, and a nomogram for predicting refractory cervicogenic headache: a retrospective multivariate analysis JOURNAL=Frontiers in Neurology VOLUME=Volume 16 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2025.1531180 DOI=10.3389/fneur.2025.1531180 ISSN=1664-2295