1. Department of Public Health, Graduate School of Chosun University, Gwangju, Korea.
2. Department of Cardiology, Chonnam National University Hospital and Medical School, Gwangju, Korea.
3. Department of Preventive Medicine, Chosun University, Gwangju, Korea.
4. Department of Internal Medicine, Chonnam National University Medical School, Gwangju, Korea.
5. Department of Preventive Medicine, Chonnam National University, Gwangju, Korea.