The mediating role of biological age in the impact of mood instability symptoms on neurodegenerative disease and mortality. - Wang, Junru; Zhang, Jiahui; Liu, Kai; Wang, Jing; Wang, Yali; Ma, Xiaojun; Li, Zhuoyuan; He, Shulan; Liu, Xiaojuan; Chen, Ping; Li, Jiangping (BMC Medicine, 2025)