1. Gwangju-Jeonnam Regional Cardiocerebrovascular Center, Chonnam National University Hospital, Gwangju, Korea.
2. Department of Preventive Medicine, Chonnam National University Medical School, Gwangju, Korea.
3. Jeonnam Regional Cancer Center, Chonnam National University Hwasun Hospital, Hwasun, Korea.
4. Department of Preventive Medicine & Institute of Wonkwang Medical Science, Wonkwang University College of Medicine, Iksan, Korea.
5. Department of Preventive Medicine, Chungnam National University Medical School, Daejeon, Korea.
6. Department of Neurology & Research Institute of Clinical Medicine, Chonbuk National University-Biomedical Institute of Chonbuk National University Hospital, Jeonju, Korea.
7. Department of Preventive Medicine, Seonam University College of Medicine, Namwon, Korea.
8. Department of Preventive Medicine, Chosun University Medical School, Gwangju, Korea.
9. Center for Creative Biomedical Scientists, Chonnam National University, Gwangju, Korea.
10. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, USA.