1. Department of Medicine, Division of Cardiology, Faculty of Medicine, Ramathibodi Hospital Mahidol University Bangkok Thailand
2. Department of Medicine, Division of Cardiovascular Diseases King Chulalongkorn Memorial Hospital Bangkok Thailand
3. Department of Cardiology Central Chest Institute of Thailand Nonthaburi Thailand
4. Department of Cardiology Buddhachinaraj Hospital Phitsanulok Thailand
5. Department of Clinical Epidemiology and Biostatistics, Faculty of Medicine, Ramathibodi Hospital Mahidol University Bangkok Thailand
6. Department of Internal Medicine, Cardiology Unit Pharmongkutklao Hospital Bangkok Thailand