1. Department of Gastroenterological Surgery, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
2. Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan
3. Department of Pathology and Experimental Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
4. Center for Graduate Medical Education, Okayama University Hospital, Okayama, Japan
5. AntiCancer, Inc, San Diego, CA, USA
6. Department of Surgery, University of California, San Diego, USA