1. Division of Geriatric Medicine, Department of Internal Medicine, Faculty of Medicine, Khon Kaen University, Thailand
2. Non-communicable Disease Research Group, Khon Kaen University, Thailand
3. Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine, Khon Kaen University, Thailand
4. Division of Nephrology, Department of Internal Medicine, Faculty of Medicine, Khon Kaen University, Thailand