1. Division of Gastroenterology, Department of Medicine, Taipei Veterans General Hospital, Taipei 11217, Taiwan
2. Division of Radiation Oncology, Department of Oncology, National Taiwan University Hospital, Taipei 11217, Taiwan
3. Department of Medical Research and Education, Taipei Veterans General Hospital, Taipei 11217, Taiwan
4. Institute of Biochemistry, National Yang-Ming University School of Medicine, Taipei 11217, Taiwan
5. Faculty of Medicine, National Yang-Ming University School of Medicine, Taipei 11217, Taiwan
6. Cheng-Hsin General Hospital, Taipei 11217, Taiwan
7. Institute of Pharmacology, National Yang-Ming University School of Medicine, Taipei 11217, Taiwan