1. Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
2. Department of Medicine, Chulabhorn International College of Medicine (CICM), Thammasat University, Pathumthani, Thailand
3. Division of Nephrology, Department of Internal Medicine, Faculty of Medicine, Thammasat University, Pathumthani, Thailand