1. MacKay Medical College, New Taipei City, Taiwan
2. Department of Internal Medicine, MacKay Memorial Hospital, Taipei, Taiwan
3. Division of Cardiology, Department of Internal Medicine, MacKay Memorial Hospital, Taipei, Taiwan
4. Division of Gastroenterology, Department of Internal Medicine, MacKay Memorial Hospital, Taipei, Taiwan
5. MacKay Junior College of Medicine, Nursing and Management, Taipei, Taiwan.