1. Research Planning and Coordination Department, Korea Institute for Health and Social Affairs, Sejong, Republic of Korea
2. Department of Health Administration and Management, Soonchunhyang University Graduate School, Asan, Republic of Korea
3. Center for Healthcare Management Science, Soonchunhyang University, Asan, Republic of Korea
4. Department of Health Administration and Management, College of Medical Science, Soonchunhyang University, Asan, Republic of Korea