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