1Division of Endocrinology and Metabolism, Department of Internal Medicine, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang-Si, Republic of Korea
2Department of Statistics, Dongguk University, Seoul, Republic of Korea
3Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang-Si, Republic of Korea