Genetic and metabolomic pathways linking frailty, chronic kidney disease, and kidney failure: a Mendelian randomization and multi-omics analysis. - Chen, Yiding; Wang, Kun; Zhang, Xiangyu; Yang, Feixiang; Liu, Tianrui; Cheng, Andong; Guan, Yu; Zhong, Jinbiao; Meng, Jialin; Zhang, Xiansheng; Liao, Guiyi (Renal Failure, 2025)