1. Department of Radiology, Chiba Cerebral and Cardiovascular Center
2. Department of Radiology, Chiba Cancer Center
3. Department of Radiology, Tokyo Jikei University Hospital
4. Department of Radiology, Kameda Medical Center
5. Department of Radiology, Chiba University Hospital
6. Department of Radiology, Sakakibara Memorial Hospital
7. Department of Neurosurgery, Chiba Emergency Medical Center
8. Department of Radiology, Kurume University School of Medicine
9. Department of Neurosurgery, Chiba Cerebral and Cardiovascular Center
10. Department of Radiology, University of Yamanashi Hospital
11. Department of Radiology, Division of Chest Surgery, Saitama Cardiovascular and Respiratory Center
12. Department of Radiology, NTT Medical Center Tokyo
13. Department of Radiology, Yokohama City University Medical Center
14. Department of Radiology, Showa University Graduate School of Nursing and Rehabilitation Science