1. Department of Thoracic Surgery, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
2. Department of Respiratory Medicine, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
3. Clinical Research Center, Chiba University Hospital, Chiba, Chiba, Japan
4. Department of Pathology, Chiba University Hospital, Chiba, Chiba, Japan
5. Department of Pathology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan