1. Division of Cardiology, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
2. Department of Family Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
3. Center for Clinical Epidemiology and Clinical Statistics, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
4. Division of Cardiology, Department of Medicine, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
5. Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand