1. Division of Endocrinology, Department of Internal Medicine Veterans Health Service Medical Center Seoul South Korea
2. Division of Endocrinology and Metabolism, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea
3. Veterans Medical Research Institute Veterans Health Service Medical Center Seoul South Korea
4. Biomedical Research Center, Asan Institute for Life Sciences Asan Medical Center Seoul South Korea
5. Department of Convergence Medicine, Asan Institute for Life Sciences, Asan Medical Center University of Ulsan College of Medicine Seoul South Korea