1. Department of Endocrinology and Metabolism; Kanagawa Children's Medical Center; Yokohama Japan
2. Department of Pediatrics; Keio University School of Medicine; Tokyo Japan
3. Department of Radiology; Kanagawa Children's Medical Center; Yokohama Japan
4. Research Center for Charged Particle Therapy; National Institute of Radiological Sciences; Chiba Japan
5. Department of Pediatrics; Hiroshima University Graduate School of Biomedical and Health Sciences; Hiroshima Japan