1. Department of Ophthalmology; Kangbuk Samsung Hospital; Sungkyunkwan University School of Medicine; Seoul Korea
2. Department of Biostatistics; Catholic University College of Medicine; Seoul Korea
3. Department of Ophthalmology; Soonchunhyang University College of Medicine; Soonchunhyang University Seoul Hospital; Seoul Korea
4. Division of Endocrinology and Metabolism; Department of Internal Medicine; St. Vincent's Hospital, College of Medicine; The Catholic University of Korea; Suwon Korea
5. Division of Endocrinology and Metabolism; Department of Internal Medicine; Kangbuk Samsung Hospital; Sungkyunkwan University School of Medicine; Seoul Korea
6. Division of Endocrinology and Metabolism; Department of Internal Medicine; Asan Medical Center; University of Ulsan College of Medicine; Seoul Korea
7. Department of Internal Medicine; Cardiovascular and Metabolic Disease Center; Inje University Sanggye Paik Hospital; Inje University College of Medicine; Seoul Korea