1. Department of Internal Medicine, Pusan National University Hospital Pusan National University School of Medicine Busan South Korea
2. Biomedical Research Institute Pusan National University Hospital Busan South Korea
3. Department of Internal Medicine, Samsung Changwon Hospital Sungkyunkwan University School of Medicine Changwon South Korea
4. Department of Internal Medicine, Kosin University Gospel Hospital Kosin University College of Medicine Busan South Korea
5. Department of Internal Medicine, Ulsan University Hospital University of Ulsan College of Medicine Ulsan South Korea
6. Department of Internal Medicine, Inje University Haeundae Paik Hospital College of Medicine, Inje University Busan South Korea
7. Department of Internal Medicine Busan St. Mary's Hospital Busan South Korea
8. Department of Internal Medicine, Jeju National University Hospital Jeju National University School of Medicine Jeju South Korea
9. Division of Endocrinology & Metabolism, Department of Internal Medicine, Busan Paik Hospital College of Medicine, Inje University Busan South Korea