1. Division of Evidence-Based Research, HIRA Research Institute, Health Insurance Review and Assessment Service (HIRA), Wonju, Korea.
2. Division of Healthcare Resource Policy Research, HIRA Research Institute, Health Insurance Review and Assessment Service (HIRA), Wonju, Korea.
3. Department of Public Health and Community Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.
4. HIRA Research Institute, Health Insurance Review and Assessment Service (HIRA), Wonju, Korea.
5. Public Healthcare Center, Seoul National University Hospital, Seoul, Korea.
6. Department of Health Policy and Management, Seoul National University College of Medicine, Seoul, Korea.