1. Division of Infectious Disease Surveillance, Korea Centers for Disease Control and Prevention, Cheongju, Korea.
2. Department of Public Health Science, Graduate School of Public Health and Institute of Health and Environment, Seoul National University, Seoul, Korea.
3. Department of Preventive Medicine, Konkuk University College of Medicine, Seoul, Korea.
4. Department of Preventive Medicine, Chungnam National University School of Medicine, Daejeon, Korea.
5. Department of Internal Medicine, Chungnam National University Hospital and School of Medicine, Daejeon, Korea.
6. Department of Internal Medicine, Inha University Hospital, Incheon, Korea.
7. Department of Internal Medicine, Dong-A University College of Medicine, Busan, Korea.
8. Department of Cardiovascular Medicine, Wonkwang University Hospital, Iksan, Korea.
9. Department of Internal Medicine, Kyungpook National University School of Medicine, Daegu, Korea.
10. Department of Internal Medicine, Gyeongsang National University School of Medicine and Hospital, Jinju, Korea.
11. Department of Preventive Medicine, Gyeongsang National University School of Medicine and Institute of Health Sciences, Jinju, Korea.
12. Center for Regional Cardiocerebrovascular Disease, Gyeongsang National University Hospital, Jinju, Korea.