1. Graduate School of Public Health, Ajou University, Suwon, Korea.
2. Ajou Institute of Korean Unification and Health Care, Suwon, Korea.
3. Department of Surgery, Samsung Medical Center, Seoul, Korea.
4. Department of Anesthesiology and Pain Medicine, Seoul Metropolitan Government-Seoul National University Boramae Medical Center, Seoul, Korea.
5. Department of Academic Affairs, Korea University College of Medicine, Seoul, Korea.
6. Association of Healthcare for Korean Unification, Seoul, Korea.