1. Gastrohepatology Unit, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
2. Northern Thai Research Group of Radiation Oncology (NTRG-RO), Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
3. Division of Geriatrics, Department of Internal Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
4. Department of Pathology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand