1. Gunma University Heavy Ion Medical Center; Maebashi Japan
2. Hospital of the National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Sciences and Technology; Chiba Japan
3. Department of Radiology; Hyogo Ion Beam Medical Center; Tatsuno Japan
4. Ion Beam Therapy Center; SAGA HIMAT Foundation; Tosu Japan
5. Department of Radiation Oncology; Yamagata University Faculty of Medicine; Yamagata Japan