1. Division of Screening Assessment and Management, Center for Public Health Science, National Cancer Center, Tsukiji, Japan
2. Division of Screening Technology, Center for Public Health Science, National Cancer Center, Tsukiji, Japan
3. Cancer Screening Center, National Cancer Center Hospital, Tsukiji, Japan
4. Department of Radiology, Jichi Medical University, Shimotsuke, Japan
5. Department of Radiology, Sakakibara Sapia-tower Clinic, Marunouchi, Japan
6. Department of Radiology, Haga Red-cross Hospital, Tochigi, Japan
7. Aomori Prefectural Central Hospital, Aomori, Japan
8. Division of Medical Support and Partnership, Center for Cancer Control and Information Services, National Cancer Center, Tsukiji, Japan