Department of Endocrinology and Metabolism Guangdong Provincial Key Laboratory of Diabetology the Third Affiliated Hospital of Sun Yat-sen University Guangzhou 510630 China;
Department of Endocrinology and Metabolism Shenzhen People s Hospital Shenzhen 518020 China;
Department of Endocrinology of the First Affiliated Hospital Division of Life Sciences and Medicine of the University of Science and Technology of China(USTC) Hefei 230026 China;
continuous subcutaneous insulin infusion; insulin requirement profiles; type 2 diabetes;