1. National Institute of Cancer Research, National Health Research Institutes, Miaoli, Taiwan
2. Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, and School of Medicine, National Yang-Ming University, Taipei, Taiwan
3. Division of General Surgery, Department of Surgery, Taipei Veterans General Hospital, and School of Medicine, National Yang-Ming University, Taipei, Taiwan
4. Department of Biochemistry, School of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan