1. Departments of Cardiovascular Medicine, Research Institute of Medical Science, Konkuk University School of Medicine, Seoul 05029, Republic of Korea
2. Department of Preventive Medicine, Konkuk University School of Medicine, Seoul 05029, Republic of Korea
3. Departments of Preventive Medicine, Dong-A University School of Medicine, Busan 49315, Republic of Korea
4. Department of Laboratory Medicine, Research Institute of Medical Science, Konkuk University School of Medicine, Seoul 05029, Republic of Korea