1. Division of Geriatric Medicine; Department of Medicine, Faculty of Medicine, Khon Kaen University; Khon Kaen Thailand
2. Division of Neurology; Department of Medicine; Faculty of Medicine, Khon Kaen University; Khon Kaen Thailand
3. Division of Ambulatory Medicine; Department of Medicine, Faculty of Medicine and Research Center in Back, Neck, Other Joint Pain and Human Performance (BNOJPH), Khon Kaen University; Khon Kaen Thailand
4. Department of Medicine, Faculty of Medicine, and Research Center in Back, Neck, Other Joint Pain and Human Performance (BNOJPH) Khon Kaen University; Khon Kaen Thailand