Association of PM2.5 and its components with cognitive dysfunction among rural older adults: Epidemiological evidence with hypothesis-generating network toxicology analysis - Huanxiang Zhang; Ziyuan Zhang; Zhenzhen Tian; Xiuli Tang; Jian Zhang; Yuan Tian; Yinghao Yuchi; Xiaotian Liu; Jian Hou; Zhenxing Mao; Yuqian Li; Chongjian Wang (NeuroToxicology, 2026)