1. Division of Geriatric Medicine, Department of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
2. Department of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
3. Division of Medical Oncology, Department of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
4. Division of Urology, Department of Surgery, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand