1. Department of Pathology, Keio University School of Medicine , Tokyo , Japan
2. Department of Diagnostic Pathology, National Hospital Organization Saitama Hospital , Saitama , Japan
3. Keio University School of Medicine Department of Pathology, , Tokyo , Japan
4. Keio University School of Medicine Division of Thoracic Surgery, Department of Surgery, , Tokyo , Japan
5. School of Medicine, International University of Health and Welfare , Chiba , Japan