1Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
2Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
3Catholic Institute of U-Healthcare, The Catholic University of Korea, Seoul, Korea.
4Graduate School of Healthcare Management and Policy, The Catholic University of Korea, Seoul, Korea.
5Division of Endocrinology and Metabolism, Department of Internal Medicine, Yeouido St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
6Clinical Research Coordinating Center, College of Medicine, The Catholic University of Korea, Seoul, Korea.
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