1. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
2. Genome Research Center for Diabetes and Endocrine Disease, Clinical Research Institute, Seoul National University Hospital, Seoul, Korea.
3. National Institute of Health, Seoul, Korea.
4. Department of Genetic Epidemiology, SNP Genetics, Inc., Seoul, Korea.
5. Department of life science, Sogang University, Seoul, Korea.
6. Department of Internal Medicine, Inje University College of Medicine, Busan, Korea.
7. Clinical Research Institute, Seoul National University Hospital, Seoul, Korea.