1. Department of Preventive Medicine, College of Medicine, School of Medicine, Kangwon National University, Chuncheon, Korea.
2. Department of Preventive Medicine, College of Medicine, Korea University, Seoul, Korea.
3. Department of Internal Medicine, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea.
4. BK21FOUR R&E Center for Learning Health Systems, Korea University, Seoul, Korea.
5. Department of Nursing, College of Nursing, Kangwon National University, Chuncheon, Korea.
6. Wonjin Institute for Occupational & Environmental Health, Seoul, Korea.
7. National Cancer Center, Goyang, Korea.
8. Graduate School of Public Health, Seoul National University, Seoul, Korea.