1. Laboratory for Cancer Genomics, RIKEN Center for Integrative Medical Sciences, Tokyo 108-8639, Japan
2. Laboratory of DNA Information Analysis, Human Genome Center, The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan
3. Department of Gastroenterology and Metabolism, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
4. Department of Anatomical Pathology, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan
5. Second Department of Surgery, Wakayama Medical University, Wakayama 641-8510, Japan
6. Department of Gastroenterological Surgery, Tokyo Women's Medical University, Tokyo 162-8666, Japan
7. Department of Surgery, Osaka International Cancer Institute, Osaka 537-8511, Japan
8. Department of Gastroenterological Surgery, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8551, Japan