1. Division of Gastroenterology; Department of Internal Medicine; MacKay Memorial Hospital; Taipei Taiwan
2. Healthy Evaluation Center; MacKay Memorial Hospital; Taipei Taiwan
3. MacKay Medical, Nursing, and Management College; Taipei Taiwan
4. Graduate Institute of Clinical Medicine; College of Medicine; National Taiwan University; Taipei Taiwan
5. Department of Internal Medicine; National Taiwan University Hospital; College of Medicine; National Taiwan University; Taipei Taiwan
6. MacKay Medical College; Taipei Taiwan