1. Department of Respiratory Medicine Comprehensive Cancer Center International Medical Center Saitama Medical University Hidaka Saitama Japan
2. Division of Respiratory Medicine Gunma Prefectural Cancer Center Ota Gunma Japan
3. Division of Thoracic Oncology Tochigi Cancer Center Utsunomiya Tochigi Japan
4. Department of Pulmonary Medicine Fukushima Medical University Fukushima Japan
5. Division of Respiratory Medicine Ibaraki Prefectural Central Hospital Kasama Ibaraki Japan
6. Department of Pulmonary Medicine National Hospital OrganizationNishisaitama‐Chuo National Hospital Tokorozawa Saitama Japan