Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. Department of Nephrology, University of South China Affiliated Changsha Central Hospital, 161 Shaoshan Road, Changsha, 410004, Hunan, China. Department of Clinical Dietitian, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. Department of Anesthesiology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. Health Management Center, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. Department of Endocrinology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. Department of Nephrology, Xiangya Hospital, Central South University, 87 Xiangya Road, Changsha, 410008, Hunan, China. xuhuiye@csu.edu.cn.