1. Department of Sports Science, Daejin University, Pocheon, Korea.
2. Department of Internal Medicine, Eulji University School of Medicine, Daejeon, Korea.
3. Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
4. Department of Endocrinology of Metabolism, Gachon University College of Medicine, Incheon, Korea.
5. Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon, Korea.
6. Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.