W Wu2, W Wu2, C X Gong3, Y Liang2, M Zhu4, H Xiong5, J F Fu1. 1. Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, Hangzhou 310052, China. 2. Department of Pediatrics, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China. 3. Department of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China. 4. Department of Endocrinology, Children's Hospital of Chongqing University, Chongqing 400014, China. 5. Department of Pediatrics, Peking University First Hospital, Beijing 100034, China.