1. Research Program for the Application
of Heavy Ions in Medical Sciences, Research Center for Charged Particle
Therapy, National Institute of Radiological Sciences (NIRS), Inage-ku, Chiba 263-8555, Japan
2. Advanced Particle Radiation
Biology Research Program, Research Center for Charged Particle Therapy, National Institute of Radiological Sciences (NIRS),
Inage-ku, Chiba 263-8555, Japan