1. Department of Thoracic Surgery, Kanagawa Cancer Center, Yokohama, Kanagawa, Japan
2. Department of Surgery, Yokohama City University, Yokohama, Kanagawa, Japan
3. Department of Pathology, Kanagawa Cancer Center, Yokohama, Kanagawa, Japan
4. Kanagawa Cancer Center, Research Institute Cancer Prevention & Control Division, Kanagawa Cancer Center, Yokohama, Kanagawa, Japan
5. Department of Thoracic Oncology, Kanagawa Cancer Center, Yokohama, Kanagawa, Japan