1. Division of Gastroenterology and Hepatology, Department of Internal Medicine National Taiwan University Hospital Taipei Taiwan
2. Division of Gastroenterology and Hepatology, Department of Internal Medicine, School of Medicine, College of Medicine Taipei Medical University Taipei Taiwan
3. Division of Gastroenterology and Hepatology, Department of Internal Medicine Taipei Medical University Hospital Taipei Taiwan
4. Health Management Center National Taiwan University Hospital Taipei Taiwan