1. Department of Healthcare Management, Institute of Global Healthcare Research, Eulji University, Seongnam, Korea.
2. Global Health Unit, Department of Health Sciences, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands.
3. Department of Biostatistics, Korea University College of Medicine, Seoul, Korea.
4. Department of Health Policy and Management, Graduate School of Public Health, Korea University, Seoul, Korea.
5. Department of Humanities and Social Medicine, College of Medicine and Catholic Institute for Healthcare Management, The Catholic University of Korea, Seoul, Korea.