1. Center for Innovative Clinical Medicine, Okayama University Hospital, Okayama, Japan
2. Department of Respiratory Medicine, Okayama University Hospital, Okayama, Japan
3. Department of Medical Oncology and Medicine, Okayama Rosai Hospital, Okayama, Japan
4. Department of Respiratory Medicine, National Hospital Organization Shikoku Cancer Center, Matsuyama, Japan
5. Department of Medical Oncology, National Hospital Organization Yamaguchi-Ube Medical Center, Ube, Japan