1. Department of Clinical Oncology, Institute of Development, Aging and Cancer, Tohoku University, Aoba-ku, Sendai, Japan
2. Department of Medical Oncology, Tohoku University Hospital, Aoba-ku, Sendai, Japan
3. Department of Clinical Oncology, Akita University Graduate School of Medicine, Akita, Japan
4. Department of Pathology, Tohoku University Graduate School of Medicine, Aobaku, Sendai, Japan
5. Department of Pathology, Sendai Kousei Hospital, Aobaku, Sendai, Japan
6. Department of Surgery, Tohoku Rosai Hospital, Aobaku, Sendai, Japan
7. Department of Clinical Oncology, Hamamatsu University School of Medicine, Higashiku, Hamamatsu, Japan
8. Department of Oncology, National Center for Global Health and Medicine, Tokyo, Japan