Affiliation: | ∗ Department of Gastroenterology, Chiba Cancer Center, Chiba, Japan;† Department of Medicine and Clinical Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan;‡ Department of Radiation Oncology, Chiba Cancer Center, Chiba, Japan;§ Department of Radiation Oncology, Graduate School of Medicine, Chiba University, Chiba, Japan |