1. Chinese Diabetes Society; 42 Dongsi Xidajie 100710 Beijing China
2. Department of Endocrinology and Metabolism; The Third Affiliated Hospital Sun Yat-sen University; Canton China
3. Department of Endocrinology and Diabetes; Campus Bio-Medico University of Rome; Rome Italy
4. Centre for Diabetes, Barts and The London School of Medicine; Queen Mary University of London; London UK