1. the Second Department of Internal Medicine, Hiroshima University Hospital
2. the Department of Pulmonary Medicine, Hiroshima City Hospital
3. the Department of Surgical Oncology, Division of Clinical Research, Institute for Radiation Biology and Medicine, Hiroshima University Hospital
4. the Division of Respiratory Diseases, Department of Medicine, Hiroshima Prefectural Hospital
5. the Department of Internal Medicine, Kagawa Prefectual Central Hospital