1. Particle Radiation Biology, Division of Radiation Life Science, Institute for Integrated Radiation and Nuclear Science, Kyoto University, Sennan-gun, Osaka, Japan;
2. Radiation Medical Physics, Division of Radiation Life Science, Institute for Integrated Radiation and Nuclear Science, Kyoto University, Sennan-gun, Osaka, Japan;
3. Particle Radiation Oncology Center, Institute for Integrated Radiation and Nuclear Science, Kyoto University, Sennan-gun, Osaka, Japan