1. Department of Preventive Medicine & Institute of Wonkwang Medical Science, Wonkwang University School of Medicine, Iksan, Korea.
2. Regional Cardiocerebrovascular Center, Wonkwang University Hospital, Iksan, Korea.
3. Department of Preventive Medicine, Chonnam National University Medical School, Hwasun, Korea.
4. Jeonnam Regional Cancer Center, Chonnam National University Hwasun Hospital, Hwasun, Korea.
5. Department of Preventive Medicine, Chungnam National University College of Medicine, Daejeon, Korea.
6. Department of Preventive Medicine, Seonam University College of Medicine, Namwon, Korea.
7. Department of Preventive Medicine, Chosun University Medical School, Gwangju, Korea.
8. Center for Creative Biomedical Scientists, Chonnam National University, Gwangju, Korea.