1. Department of Radiology, Nagoya City University Graduate School of Medical Sciences, 1, Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan.
2. Department of Radiology, Teikyo University School of Medicine, Tokyo, Japan.
3. Department of Radiology, St. Marianna University School of Medicine, Kawasaki, Japan.
4. Department of Radiology, Gifu University, Gifu, Japan.
5. Department of Radiology, Kurume University School of Medicine, Kurume, Japan.
6. Department of Radiology, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan.
7. Department of Radiology, Osaka City University Graduate School of Medicine, Osaka, Japan.
8. Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
9. Department of Radiology, Oita University, Oita, Japan.
10. Department of Radiology, Hayashi Hospital, Fukui, Japan.
11. Department of Radiology, Kyoto City Hospital, Kyoto, Japan.
12. Department of Radiology, Kagoshima University, Kagoshima, Japan.
13. Department of Radiology, North Osaka Housenka Hospital, Osaka, Japan.
14. Department of Radiology, Nara Medical University, Kashihara, Japan.
15. Department of Radiology, Nasu Red Cross Hospital, Tochigi, Japan.
16. Department of Radiology, Okinawa Prefectural Nanbu Medical Center and Children's Medical Center, Haebaru, Okinawa, Japan.
17. Department of Radiology, University of Occupational and Environmental Health, Fukuoka, Japan.
18. Department of Radiology, Aichi Medical University, Nagakute, Japan.