1. Department of Hematology, Oncology, and Respiratory Medicine Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama Okayama Japan
2. Center of Innovative Clinical Medicine Okayama University Hospital Okayama Okayama Japan
3. Division of Cancer Epidemiology and Prevention, Department of Preventive Medicine Aichi Cancer Center Research Institute Nagoya Aichi Japan
4. Department of Respiratory Medicine Yamaguchi Ube Medical Center Ube Yamaguchi Japan
5. Department of Respiratory Medicine Kure Kyosai Hospital Kure Hiroshima Japan
6. Health Service Center Okayama University Okayama Okayama Japan
7. Center for Clinical Oncology Okayama University Hospital Okayama Okayama Japan
8. Department of Allergy and Respiratory Medicine Okayama University Hospital Okayama Okayama Japan
9. Department of Respiratory Medicine Okayama Medical Center Okayama Okayama Japan