1. Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongman, Korea.
2. Division of Endocrinology and Metabolism, Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, Korea.
3. Department of Food and Nutrition, Keimyung University, Daegu, Korea.
4. Department of Endocrinology and Metabolism, Kyung Hee University School of Medicine, Kyung Hee University Hospital at Gangdong, Seoul, Korea.