Victoza in the treatment of type 2 diabetes mellitus: a multicenter, randomized, open, parallel controlled, phase Ⅲ clinical study ………………………………………………… 840 Gu Nan, Guo Xiaohui, Pang Shuguang, Cheng Zhifeng, Wang Haifang, Geng Jianlin, Sun Jiao, Lyu Shujun, Fu Wenyan, Peng Hui, Li Shunbin, Ma Yujin, Zhou Dongmei, Tu Ping, Shi Xiaoyan, Lu Yibing, Yang Jing, Zhang Qiu, Ye Shandong, Liu Jingdong, Sun Chunmei Development and validation of a predictive model for the risk of QTc