1. Division of Endocrinology and Metabolism, Department of Internal Medicine Yeungnam University College of Medicine Daegu Republic of Korea
2. Division of Endocrinology and Metabolism, Department of Internal Medicine Eulji University Hospital, School of Medicine Daejeon Republic of Korea
3. Division of Cardiology, Department of Internal Medicine Seoul National University College of Medicine, Seoul National University Bundang Hospital Seongnam Republic of Korea
4. Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul National University College of Medicine Seoul National University Bundang Hospital Seongnam Republic of Korea