1. Department of Internal Medicine, Pochon CHA University, Korea.
2. Task Force Team for Basic Statistical Study of Diabetes Mellitus of Korean Diabetes Association, Korea.
3. Department of Endocrinology and Metabolism, Ajou University School of Medicine, Korea.
4. Department of Internal Medicine, College of Medicine, Eulji University, Korea.
5. Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University, Korea.
6. Department of Endocrinology, Gachon University of Science and Medicine, Gil Medical Center, Korea.
7. Division of Endocrinology and Metabolism, Pusan Paik Hospital, Inje College of Medicine, Korea.
8. Department of Internal Medicine, The Catholic University, Korea.
9. Department of Internal Medicine, Yonsei University College of Medicine, Korea.
10. Division of Endocrinology and Metabolism, Department of Internal Medicine, Ewha Womans University College of Medicine, Korea.
11. Department of Biostatistics, College of Medicine, Korea University, Korea.
12. Department of Internal Medicine, Wonju College of Medicine, Yonsei University, Korea.
13. Department of Research, Health Insurance Review Agency, Korea.