1. Departments of Charged Particle Therapy Research
2. School of Engineering, Tokai University, Kanagawa, Japan
3. Proton Medical Research Center, University of Tsukuba, Tsukuba, Japan
4. Institute for Quantum Life Science, National Institutes for Quantum and Radiological Science and Technology, Ibaraki, Japan
5. Departments of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
6. Heavy Ion Medical Center, Gunma University, Gunma, Japan