1. Division of Gastroenterology, Department of Internal Medicine Fu Jen Catholic University Hospital New Taipei City Taiwan
2. Division of Gastroenterology, Department of Internal Medicine National Taiwan University Hospital Hsin‐Chu Branch Hsinchu Taiwan
3. Department of Surgery National Taiwan University Hospital Taipei Taiwan
4. Department of Pathology National Taiwan University Hospital Taipei Taiwan
5. Department of Medical Research National Taiwan University Hospital Taipei Taiwan
6. Department of Laboratory Medicine National Taiwan University Hospital Cancer Center Taipei Taiwan
7. Division of Gastroenterology, Department of Internal Medicine National Taiwan University Hospital Taipei Taiwan