1. Health Insurance Review & Assessment Service, Wonju, Korea.
2. Department of Psychiatry, Graduate School of Medicine, Kangwon National University, Chuncheon, Korea.
3. Maymind Psychiatric Clinic, Seoul, Korea.
4. Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea.
5. Institute of Human Complexity and Systems Science, Yonsei University, Incheon, Korea.