Dietary index for gut microbiota and its protective role against kidney stones: evidence of diabetes as a mediator from NHANES cross-sectional data - Wang, Lei; Wu, Junjun; Jiang, Ziwen; Wang, Chao; Lin, Fuxiang; Zhong, Yuxiang; Zhao, Pengpeng; Wei, Wei; Huang, Jianhua; Xu, Zhanping (Frontiers in Nutrition, 2025)