1. Busan Regional Cardiocerebrovascular Disease Center, Dong-A University Hospital, Busan, Korea.
2. Department of Biostatistics, Korea University College of Medicine, Seoul, Korea.
3. Gyeonggi Regional Cardiocerebrovascular Disease Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.
4. Gangwon Regional Cardiocerebrovascular Disease Center, Kangwon National University Hospital, Kangwon National University School of Medicine, Chuncheon, Korea.
5. Incheon Regional Cardiocerebrovascular Disease Center, Inha University College of Medicine, Incheon, Korea.
6. Daegu-Gyeongbuk Regional Cardiocerebrovascular Disease Center, Kyungpook National University Hospital, Daegu, Korea.
7. Gyeongnam Regional Cardiocerebrovascular Disease Center, Gyeongsang National University Hospital, Gyeongsang National University School of Medicine, Jinju, Korea.
8. Jeonbuk Regional Cardiocerebrovascular Center, Wonkwang University Hospital, Iksan, Korea.
9. Gwangju-Jeonnam Regional Cardiocerebrovascular Disease Center, Chonnam National University Medical School and Hospital, Gwangju, Korea.
10. Jeju Regional Cardiocerebrovascular Disease Center, Jeju National University Hospital, Jeju, Korea.
11. Daejeon-Chungnam Regional Cardiocerebrovascular Disease Center, Hospital and College of Medicine, Chungnam National University, Daejeon, Korea.
12. Chungbuk Regional Cardiocerebrovascular Disease Center, Chungbuk National University and Hospital, Cheongju, Korea.
13. Department of Preventive Medicine, School of Medicine, Konkuk University, Seoul, Korea.