1. Department of Surgery, Division of General Surgery, Taipei Veterans General Hospital, Taipei, Taiwan
2. School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
3. Department of Oncology, Center of Immuno-Oncology, Taipei Veterans General Hospital, Taipei, Taiwan
4. Department of Pathology, Taipei Veterans General Hospital, Taipei, Taiwan
5. Department of Anatomical Pathology, Cheng Hsin General Hospital, Taipei, Taiwan
6. National Yang Ming Chiao Tung University Hospital, Yilan, Taiwan