1. Department of Internal Medicine, Division of Cardiology Chonnam National University Medical School, Chonnam National University Hospital Gwangju South Korea
2. Department of Emergency Medicine Chonnam National University Medical School, Chonnam National University Hospital Gwangju South Korea
3. Department of Thoracic and Cardiovascular Surgery Chonnam National University Medical School, Chonnam National University Hospital Gwangju South Korea