1. Department of Preventive Medicine, College of Medicine, Korea University, Seoul, Korea.
2. Department of Internal Medicine, Division of Rheumatology, College of Medicine, Hanyang University, Seoul, Korea.
3. Department of Preventive Medicine, University of Ulsan, Seoul, Korea.
4. Department of Health Sercive Management, Kyung Hee University College of Business Administration, Seoul, Korea.
5. Department of Health Policy and Management, College of Medicine, Kangwon National University, Choncheon, Korea.
6. Department of Preventive Medicine, College of Medicine, Kangwon National University, Choncheon, Korea.
7. Research Institute for National Cancer Control and Evaluation National Cancer Center, Goyang, Korea.
8. Department of Health Policy And Management, Seoul National University College of Medicine, Seoul, Korea.