1. Division of Pathology, Research Center for Innovative Oncology, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
2. Division of Thoracic Oncology, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
3. Department of Pulmonary Medicine and Oncology, Graduate School of Medicine, Nippon Medical School, Sendagi, Bunkyo City, Tokyo 113-0022, Japan
4. Division of Thoracic Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
5. Division of Thoracic Oncology, National Cancer Center Hospital, Tsukiji, Chuo City, Tokyo 104-0045, Japan