1. Radiation and Cancer Biology Group, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan.
2. Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan.
3. QST Hospital, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan.
4. Department of Pathology, Saitama Cancer Center, Saitama, Japan.
5. Department of Radiology, Jichi Medical University, Shimotsuke, Japan.