Yunfeng Zhou1, Xiaoyan Zhang1, Youfei Guan2. 1. Shenzhen University Diabetes Center, AstraZeneca-Shenzhen University Joint Institute of Nephrology, Shenzhen University Health Science Center, Shenzhen, China. 2. Shenzhen University Diabetes Center, AstraZeneca-Shenzhen University Joint Institute of Nephrology, Shenzhen University Health Science Center, Shenzhen, China. youfeiguan@szu.edu.cn.