1. Department of Health Care Management, Catholic University of Pusan, Busan 46265, South Korea
2. Institute of Health Services Research, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
3. Department of Preventive Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
4. Department of Biostatistics, Graduate School of Public Health, Yonsei University, Seoul 03722, Republic of Korea
5. Department of Hospital Administration, Graduate School of Public Health, Yonsei University, Seoul 03722, Republic of Korea
6. Department of Health Care Administration,Kosin University, Busan 49267, Republic of Korea