1. Division of Pulmonary Medicine, Department of MedicineJichi Medical University Shimotsuke Japan
2. Department of Respiratory MedicineJR Sapporo Hospital Sapporo Japan
3. Department of RadiologyKansai Rosai Hospital Amagasaki Japan
4. Faculty of Medicine and Graduate School of Medicine, Department of Respiratory MedicineHokkaido University Sapporo Japan
5. Department of Respiratory MedicineShinjuku Tsurukame Clinic Shibuya Japan