Sex and age disparities in multi-metal mixture exposure and cognitive impairment in urban elderly individuals: The mediation effect and biological function of metabolites - Qingzhi Hou; Jiujing Lin; Xiangsheng Xue; Yuchen Zhang; Zhanhui Qiu; Haoran Zhang; Jia Li; Harry Wang; Shuping Zhang; Zhigang Yao; Xiaomei Li; Fei Wang; et al. (Science of The Total Environment, 2024)