1. Department of Internal Medicine, Division of Medical Oncology & Respiratory Medicine Shimane University Faculty of Medicine Izumo Japan
2. Department of Respiratory Internal Medicine Hiroshima University Hospital Hiroshima Japan
3. Department of Respiratory Medicine Hiroshima Prefectural Hospital Hiroshima Japan
4. Department of Respiratory Medicine Hiroshima Red Cross Hospital and Atomic‐bomb Survivors Hospital Hiroshima Japan
5. Respiratory Medicine SUTANI Clinic Izumo Japan