1. Department of Healthcare Management and Institute of Global Healthcare Research, Eulji University, Seongnam, Republic of Korea.
2. Department of Healthcare Management, Eulji University, Seongnam, Republic of Korea.
3. Department of Humanities and Social Medicine, College of Medicine and Catholic Institute for Healthcare Management, the Catholic University of Korea, Seoul, Republic of Korea.
4. Department of Public Healthcare Services, Seoul Bukbu Hospital, Seoul, Republic of Korea.
5. Division of Endocrinology and Metabolism, Department of Internal Medicine, Hallym University Hangang Sacred Heart Hospital, Seoul, Republic of Korea.
6. Division of Endocrinology and Metabolism, Department of Internal Medicine, Korea University College of Medicine, Seoul, Republic of Korea.