1. Department of Diagnostic Pathology, Kashiwa Kousei General Hospital, Kashiwa, Chiba 277‑8551, Japan
2. Department of Surgery, Kashiwa Kousei General Hospital, Kashiwa, Chiba 277‑8551, Japan
3. Department of Medical Oncology, National Cancer Center Hospital East, Kashiwa, Chiba 277‑8577, Japan
4. Department of Thoracic Surgery, Kashiwa Kousei General Hospital, Kashiwa, Chiba 277‑8551, Japan