1. Department of Medicine, Division of Respirology, Neurology, and Rheumatology, Kurume University School of Medicine, Kurume, Japan;
2. Respiratory Medicine, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan;
3. Department of Internal Medicine, Division of Hematology, Respiratory Medicine and Oncology, Faculty of Medicine, Saga University, Saga, Japan;
4. Department of Respiratory Medicine, Kumamoto University Hospital, Kumamoto, Japan;
5. Department of Pulmonary Medicine, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan