Affiliation: | 1. Division of Pathology, Research Center for Innovative Oncology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa-city, Chiba, 277-8577, Japan 4. Division of Medical Oncology, Jichi University School of Medicine, 3311-1 Yakushiji, Shimotsuke-city, Tochigi, 329-0498, Japan 2. Division of Surgery, Niigata Cancer Center Hospital, 2-15-3 Kawagishicho, Niigata-city, Niigata, 951-8566, Japan 3. Division of Gastroenterology, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa-city, Chiba, 277-8577, Japan
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