1. Department of Pathology and Clinical LaboratoriesNational Cancer Center Hospital Chuo‐ku Tokyo Japan
2. Department of Endoscopy, Respiratory Endoscopy DivisionNational Cancer Center Hospital Chuo‐ku Tokyo Japan
3. Department of Thoracic OncologyNational Cancer Center Hospital Chuo‐ku Tokyo Japan
4. Department of Thoracic SurgeryNational Cancer Center Hospital Chuo‐ku Tokyo Japan