1. Division of Developmental Therapeutics, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center, Kashiwa, Japan
2. Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwa, Japan
3. Pathology Division, National Cancer Center Hospital, Tokyo, Japan
4. Pathology Division, National Cancer Center Hospital East, Kashiwa, Japan
5. Colorectal Surgery Division, National Cancer Center Hospital, Tokyo, Japan