1. Division of Endocrinology and Metabolism, Department of Internal Medicine, Dongguk University Ilsan Hospital, Dongguk University College of Medicine, Goyang, Korea.
2. Division of Endocrinology, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.
3. Severance Check-up, Severance Hospital, Yonsei University Health System, Seoul, Korea.
4. Severance Executive Healthcare Clinic, Severance Hospital, Yonsei University Health System, Seoul, Korea.