1. Radiobiology for Children's Health Program; National Institute of Radiological Sciences; 4-9-1 Anagawa; Inage-ku Chiba; 263-8555; Japan
2. Laboratory Animal and Genome Sciences Section; National Institute of Radiological Sciences; 4-9-1 Anagawa; Inage-ku Chiba; 263-8555; Japan
3. Japan Synchrotron Radiation Research Institute; Mikazuki; Hyogo; 679-5198; Japan
4. International Coastal Research Center, Ocean Research Institute; University of Tokyo; Kashiwanoha; Chiba; 277-8564; Japan
5. School of Veterinary Medicine; Kitasato University; Towada; Aomori; 034-8628; Japan
6. Graduate School of Medicine; Juntendo University; Hongo; Tokyo; 113-8421; Japan
7. Graduate School of Science; Chiba University; Yayoi-cho; Chiba; 263-8522; Japan