[1
] Division of Endocrinology and Metabolism, Department of Internal Medicine, Kangbuk
Samsung Hospital Sungkyunkwan University School of Medicine Seoul Republic of Korea
[2
] Department of Internal Medicine, CHA Bundang Medical Center CHA University School
of Medicine Seongnam Republic of Korea
[3
] Department of Internal Medicine, Asan Medical Center University of Ulsan College
of Medicine Seoul Republic of Korea
[4
] Asan Diabetes Center, Asan Medical Center Seoul Republic of Korea
[5
] Division of Biostatistics, Department of R&D Management, Kangbuk Samsung Hospital
Sungkyunkwan University School of Medicine Seoul Republic of Korea
[6
] Global Medical and Clinical Affairs, Medtronic Diabetes Northridge California USA