1. Department of Gastroenterological, Breast and Endocrine Surgery, Yamaguchi University Graduate School of Medicine, Yamaguchi 755-8505, Japan
2. Oncology Center, Yamaguchi University Hospital, Yamaguchi 755-8505, Japan
3. Department of Surgery, Kindai University Faculty of Medicine, Osaka 589-8511, Japan
4. Department of Immunology, School of Medicine, Kochi University, Kochi 780-8520, Japan
5. Division of Cellular Signaling, Institute for Advanced Medical Research, Keio University School of Medicine, Tokyo 160-8582, Japan
6. Center for Immunotherapy Roswell Park Cancer Institute, Buffalo, NY 14263, USA
7. Cancer Vaccine Center, Kurume University, Kurume 839-0863, Japan