Affiliation: | 1. Shonan Kamakura General Hospital, Kamakura, Tokyo, Japan;2. Japan Clinical Oncology Group Data Centre/National Cancer Centre, Tokyo, Japan;3. Saitama Cancer Centre, Saitama, Japan;4. Yamagata Prefectural Central Hospital, Yamagata, Japan;5. Niigata Cancer Centre Hospital, Niigata, Japan;6. Hyogo College of Medicine, Nishinomiya, Japan |