Effectiveness and safety of subthalamic nucleus deep brain stimulation in isolated generalised or segmental dystonia (SUNDYS trial): a study protocol. - Hu, Kejia; Wu, Yunhao; Shen, Tianxiao; Zhou, Jingwei; Li, Hongxia; Dong, Hongjuan; Yi, Wei; Luo, Chun; Jin, Lingjing; Liu, Chunfeng; Shang, Huifang; Zhan, Shikun; et al. (British Journal of Neurosurgery, 2026)