1. Department of Radiology, Hyogo Medical University, Nishinomiya, Hyogo, Japan
2. Division of Respiratory Medicine, Department of Internal Medicine, Hyogo Medical University, Nishinomiya, Hyogo, Japan
3. Department of Thoracic Surgery, Hyogo Medical University, Nishinomiya, Hyogo, Japan
4. Department of Radiology, Kindai University Faculty of Medicine, Osaka, Japan