1. Department of Endocrinology and Metabolism, Ajou University School of Medicine, Suwon 16499, Republic of Korea
2. Department of Physiology, Ajou University School of Medicine, Suwon 16499, Republic of Korea
3. Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul Medical Center, Seoul 02076, Republic of Korea
4. Department of Physiology, Ajou University School of Medicine, Suwon 16499, Republic of KoreaDivision of Endocrinology and Metabolism, Department of Internal Medicine, Seoul Medical Center, Seoul 02076, Republic of Korea